Categories
The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
(first | last) View (previous 3,000 | next 3,000) (20 | 50 | 100 | 250 | 500)- Carphephorus odoratissimus (2 members)
- Carphochaete (1 member)
- Carpinus (2 members)
- Carpinus caroliniana (2 members)
- Carpobrotus (2 members)
- Carrichtera (1 member)
- Carsonia (1 member)
- Carthamus (4 members)
- Carya (12 members)
- Carya ovata (2 members)
- Caryophyllaceae (8 members)
- Caryophyllaceae subfam. Alsinoideae (32 members)
- Caryophyllaceae subfam. Caryophylloideae (16 members)
- Caryophyllaceae subfam. Paronychioideae (12 members)
- Caryophyllaceae subfam. Polycarpoideae (14 members)
- Caryota (2 members)
- Cascadia (1 member)
- Cassiope (5 members)
- Cassiope mertensiana (4 members)
- Cassiope tetragona (2 members)
- Cassytha (1 member)
- Castanea (3 members)
- Castilleja (139 members)
- Castilleja affinis (3 members)
- Castilleja ambigua (4 members)
- Castilleja angustifolia (3 members)
- Castilleja applegatei (4 members)
- Castilleja campestris (2 members)
- Castilleja densiflora (3 members)
- Castilleja exserta (3 members)
- Castilleja flava (2 members)
- Castilleja hispida (2 members)
- Castilleja martini (2 members)
- Castilleja miniata (4 members)
- Castilleja minor (4 members)
- Castilleja pallescens (2 members)
- Castilleja pallida (2 members)
- Castilleja parviflora (4 members)
- Castilleja pilosa (3 members)
- Castilleja rubicundula (2 members)
- Castilleja scabrida (2 members)
- Castilleja subinclusa (3 members)
- Castilleja tenuiflora (1 member)
- Casuarina (5 members)
- Casuarina cunninghamiana (1 member)
- Casuarina equisetifolia (1 member)
- Casuarinaceae (2 members)
- Catabrosa (1 member)
- Cathestecum (2 members)
- Catopsis (3 members)
- Catoscopiaceae (2 members)
- Catoscopium (1 member)
- Caulanthus (17 members)
- Caulophyllum (2 members)
- Causonis (1 member)
- Cayaponia (2 members)
- Ceanothus (4 members)
- Ceanothus crassifolius (2 members)
- Ceanothus cuneatus (4 members)
- Ceanothus foliosus (3 members)
- Ceanothus gloriosus (3 members)
- Ceanothus impressus (2 members)
- Ceanothus jepsonii (2 members)
- Ceanothus megacarpus (2 members)
- Ceanothus oliganthus (3 members)
- Ceanothus prostratus (2 members)
- Ceanothus subg. Ceanothus (33 members)
- Ceanothus subg. Cerastes (29 members)
- Ceanothus tomentosus (2 members)
- Ceanothus velutinus (2 members)
- Celastraceae (24 members)
- Celastrus (2 members)
- Celosia (5 members)
- Celtica (1 member)
- Celtis (6 members)
- Cenchrus (8 members)
- Centaurea (22 members)
- Centaurea stoebe (1 member)
- Centaurea virgata (1 member)
- Centratherum (1 member)
- Centromadia (5 members)
- Centromadia parryi (4 members)
- Centromadia pungens (2 members)
- Centrostegia (1 member)
- Cephalanthera (1 member)
- Cerastium (32 members)
- Cerastium alpinum (2 members)
- Cerastium arvense (2 members)
- Cerastium fontanum (2 members)
- Cerastium nutans (2 members)
- Cerastium velutinum (2 members)
- Ceratiola (1 member)
- Ceratodon (3 members)
- Ceratodon purpureus (3 members)
- Ceratophyllaceae (2 members)
- Ceratophyllum (4 members)
- Ceratophyllum muricatum (1 member)
- Ceratopteris (3 members)
- Ceratotheca (1 member)
- Cercocarpus (6 members)
- Cercocarpus betuloides (3 members)
- Cercocarpus ledifolius (3 members)
- Cervantesiaceae (2 members)
- Cevallia (1 member)
- Chaenactis (6 members)
- Chaenactis carphoclinia (2 members)
- Chaenactis douglasii (2 members)
- Chaenactis glabriuscula (5 members)
- Chaenactis sect. Acarphaea (3 members)
- Chaenactis sect. Chaenactis (8 members)
- Chaenactis sect. Macrocarphus (9 members)
- Chaenomeles (2 members)
- Chaenorhinum (2 members)
- Chaenorhinum minus (1 member)
- Chaetadelpha (1 member)
- Chaetopappa (9 members)
- Chaetopappa asteroides (2 members)
- Chamaebatia (2 members)
- Chamaebatiaria (1 member)
- Chamaechaenactis (1 member)
- Chamaecyparis (3 members)
- Chamaedaphne (1 member)
- Chamaedorea (1 member)
- Chamaelirium (1 member)
- Chamaemelum (2 members)
- Chamaenerion (3 members)
- Chamaenerion angustifolium (2 members)
- Chamaerhodos (1 member)
- Chamelaucium (1 member)
- Chaptalia (3 members)
- Chasmanthe (1 member)
- Chasmanthium (5 members)
- Cheilanthes (28 members)
- Cheiroglossa (1 member)
- Chelidonium (1 member)
- Chelone (5 members)
- Chelone obliqua (3 members)
- Chenia (1 member)
- Chenopodiaceae (54 members)
- Chenopodium (4 members)
- Chenopodium berlandieri (6 members)
- Chenopodium capitatum (2 members)
- Chenopodium glaucum (2 members)
- Chenopodium incanum (3 members)
- Chenopodium polyspermum (2 members)
- Chenopodium rubrum (2 members)
- Chenopodium sect. Agathophytum (2 members)
- Chenopodium sect. Blitum (3 members)
- Chenopodium sect. Chenopodium (16 members)
- Chenopodium sect. Degenia (1 member)
- Chenopodium sect. Glauca (2 members)
- Chenopodium sect. Grossefoveata (1 member)
- Chenopodium sect. Pseudoblitum (3 members)
- Chenopodium subg. Blitum (10 members)
- Chenopodium subg. Chenopodium (4 members)
- Chenopodium subsect. Chenopodium (4 members)
- Chenopodium subsect. Favosa (5 members)
- Chenopodium subsect. Fremontia (5 members)
- Chenopodium subsect. Leptophylla (9 members)
- Chenopodium subsect. Polysperma (2 members)
- Chenopodium subsect. Standleyana (1 member)
- Chenopodium subsect. Undata (1 member)
- Chenopodium subsect. Urbica (1 member)
- Chimaphila (4 members)
- Chimaphila umbellata (1 member)
- Chionodoxa (1 member)
- Chionophila (2 members)
- Chloracantha (2 members)
- Chloracantha spinosa (1 member)
- Chloris (19 members)
- Chloris canterae (2 members)
- Chlorocrambe (1 member)
- Chlorogalum (7 members)
- Chlorogalum pomeridianum (3 members)
- Chlorogalum purpureum (2 members)
- Chloropyron (6 members)
- Chloropyron maritimum (3 members)
- Chloropyron molle (2 members)
- Chondrilla (1 member)
- Chorisiva (1 member)
- Chorispora (1 member)
- Chorizanthe (6 members)
- Chorizanthe biloba (2 members)
- Chorizanthe brevicornu (2 members)
- Chorizanthe cuspidata (2 members)
- Chorizanthe fimbriata (2 members)
- Chorizanthe parryi (2 members)
- Chorizanthe polygonoides (2 members)
- Chorizanthe pungens (2 members)
- Chorizanthe robusta (2 members)
- Chorizanthe sect. Acanthogonum (6 members)
- Chorizanthe sect. Fragile (2 members)
- Chorizanthe sect. Ptelosepala (32 members)
- Chorizanthe subg. Amphietes (6 members)
- Chorizanthe subg. Eriogonella (1 member)
- Chorizanthe subg. Quintaria (1 member)
- Chorizanthe xanti (2 members)
- Chromolaena (4 members)
- Chrysactinia (1 member)
- Chrysanthemoides (1 member)
- Chryso-hypnum (1 member)
- Chrysobalanaceae (4 members)
- Chrysobalanus (2 members)
- Chrysobalanus icaco (1 member)
- Chrysogonum (2 members)
- Chrysogonum virginianum (3 members)
- Chrysolepis (3 members)
- Chrysolepis chrysophylla (2 members)
- Chrysoma (1 member)
- Chrysophyllum (2 members)
- Chrysophyllum oliviforme (1 member)
- Chrysopogon (4 members)
- Chrysopsis (13 members)
- Chrysopsis gossypina (3 members)
- Chrysopsis linearifolia (2 members)
- Chrysosplenium (6 members)
- Chrysothamnus (10 members)
- Chrysothamnus viscidiflorus (5 members)
- Chylismia (4 members)
- Chylismia brevipes (3 members)
- Chylismia cardiophylla (2 members)
- Chylismia claviformis (10 members)
- Chylismia scapoidea (4 members)
- Chylismia sect. Chylismia (19 members)
- Chylismia sect. Lignothera (3 members)
- Chylismia specicola (2 members)
- Chylismia walkeri (2 members)
- Chylismiella (1 member)
- Cichorium (1 member)
- Cienfuegosia (2 members)
- Cimicifuga (6 members)
- Cinclidium (4 members)
- Cinna (3 members)
- Cinnamomum (1 member)
- Circaea (5 members)
- Circaea alpina (2 members)
- Circaea canadensis (1 member)
- Cirriphyllum (1 member)
- Cirsium (78 members)
- Cirsium arizonicum (5 members)
- Cirsium clavatum (3 members)
- Cirsium cymosum (2 members)
- Cirsium douglasii (2 members)
- Cirsium eatonii (7 members)
- Cirsium edule (3 members)
- Cirsium fontinale (3 members)
- Cirsium horridulum (3 members)
- Cirsium hydrophilum (2 members)
- Cirsium inamoenum (2 members)
- Cirsium occidentale (7 members)
- Cirsium ochrocentrum (2 members)
- Cirsium pulcherrimum (2 members)
- Cirsium pumilum (2 members)
- Cirsium remotifolium (3 members)
- Cirsium scariosum (8 members)
- Cissampelos (1 member)
- Cissus (2 members)
- Cistaceae (10 members)
- Cistanthe (11 members)
- Cistus (5 members)
- Citrullus (4 members)
- Citrullus lanatus (1 member)
- Cladanthus (1 member)
- Cladium (3 members)
- Cladoraphis (1 member)
- Claopodium (4 members)
- Clappia (1 member)
- Clarkia (16 members)
- Clarkia amoena (5 members)
- Clarkia biloba (3 members)
- Clarkia borealis (2 members)
- Clarkia concinna (3 members)
- Clarkia cylindrica (2 members)
- Clarkia gracilis (4 members)
- Clarkia mildrediae (2 members)
- Clarkia purpurea (3 members)
- Clarkia sect. Biortis (1 member)
- Clarkia sect. Clarkia (1 member)
- Clarkia sect. Eucharidium (3 members)
- Clarkia sect. Fibula (4 members)
- Clarkia sect. Godetia (8 members)
- Clarkia sect. Myxocarpa (9 members)
- Clarkia sect. Phaeostoma (14 members)
- Clarkia sect. Rhodanthos (6 members)
- Clarkia speciosa (4 members)
- Clarkia subsect. Connubium (1 member)
- Clarkia subsect. Flexicaules (2 members)
- Clarkia subsect. Heterogaura (1 member)
- Clarkia subsect. Jugales (2 members)
- Clarkia subsect. Lautiflorae (5 members)
- Clarkia subsect. Micranthae (1 member)
- Clarkia subsect. Phaeostoma (5 members)
- Clarkia subsect. Primigenia (4 members)
- Clarkia subsect. Prognatae (1 member)
- Clarkia subsect. Sympherica (4 members)
- Clarkia tembloriensis (2 members)
- Clarkia xantiana (2 members)
- Clasmatodon (1 member)
- Claytonia (29 members)
- Claytonia exigua (2 members)
- Claytonia parviflora (4 members)
- Claytonia perfoliata (3 members)
- Claytonia rubra (2 members)
- Cleistes (2 members)
- Cleistocarpidium (1 member)
- Clematis (8 members)
- Clematis columbiana (2 members)
- Clematis hirsutissima (2 members)
- Clematis occidentalis (3 members)
- Clematis pitcheri (2 members)
- Clematis subg. Atragene (4 members)
- Clematis subg. Clematis (12 members)
- Clematis subg. Viorna (20 members)
- Clematis subg. Viticella (1 member)
- Clematis tangutica (1 member)
- Cleomaceae (24 members)
- Cleome (2 members)
- Cleomella (9 members)
- Cleomella hillmanii (2 members)
- Cleoserrata (2 members)
- Clethra (3 members)
- Clethraceae (2 members)
- Cliftonia (1 member)
- Climaciaceae (2 members)
- Climacium (2 members)
- Clintonia (4 members)
- Clusia (1 member)
- Clusiaceae (2 members)
- Cnidoscolus (3 members)
- Coccinia (1 member)
- Coccoloba (2 members)
- Coccothrinax (1 member)
- Cocculus (2 members)
- Cochlearia (3 members)
- Cochlospermaceae (2 members)
- Cocos (1 member)
- Codriophorus (4 members)
- Codriophorus sect. Codriophorus (6 members)
- Codriophorus sect. Fascicularia (3 members)
- Coeloglossum (1 member)
- Coelophragmus (1 member)
- Coelorachis (4 members)
- Coincya (2 members)
- Coincya monensis (1 member)
- Coix (1 member)
- Coleanthus (1 member)
- Coleogyne (1 member)
- Collinsia (24 members)
- Collinsia bartsiifolia (4 members)
- Collinsia heterophylla (2 members)
- Collinsia sparsiflora (2 members)
- Colocasia (1 member)
- Coloration (12 members)
- Colubrina (10 members)
- Colubrina asiatica (1 member)
- Colubrina cubensis (1 member)
- Columbiadoria (1 member)
- Comandra (2 members)
- Comandra umbellata (3 members)
- Comandraceae (4 members)
- Comarostaphylis (2 members)
- Comarostaphylis diversifolia (2 members)
- Comarum (1 member)
- Combretaceae (10 members)
- Combretum (1 member)
- Commelina (10 members)
- Commelina diffusa (2 members)
- Commelinaceae (12 members)
- Commicarpus (1 member)
- Comptonia (1 member)
- Conardia (1 member)
- Condalia (9 members)
- Condalia globosa (1 member)
- Condalia warnockii (2 members)
- Condition (75 members)
- Conicosia (1 member)
- Coniferophyta (3 members)
- Conimitella (1 member)
- Conocarpus (1 member)
- Conoclinium (4 members)
- Conoclinium betonicifolium (2 members)
- Conopholis (2 members)
- Conostomum (1 member)
- Conringia (1 member)
- Consolea (1 member)
- Consolida (4 members)
- Constancea (1 member)
- Convallaria (2 members)
- Convallaria majalis (2 members)
- Conyza (4 members)
- Coptis (4 members)
- Corallorhiza (10 members)
- Corallorhiza maculata (2 members)
- Corallorhiza odontorhiza (2 members)
- Corallorhiza striata (2 members)
- Corchorus (5 members)
- Cordylanthus (19 members)
- Cordylanthus eremicus (2 members)
- Cordylanthus kingii (3 members)
- Cordylanthus pilosus (2 members)
- Cordylanthus rigidus (4 members)
- Cordylanthus tenuis (5 members)
- Cordylanthus wrightii (3 members)
- Corema (1 member)
- Coreocarpus (1 member)
- Coreopsis (16 members)
- Coreopsis sect. Calliopsis (2 members)
- Coreopsis sect. Coreopsis (7 members)
- Coreopsis sect. Eublepharis (4 members)
- Coreopsis sect. Gyrophyllum (6 members)
- Coreopsis sect. Leptosyne (3 members)
- Coreopsis sect. Pugiopappus (3 members)
- Coreopsis sect. Silphidium (1 member)
- Coreopsis sect. Tuckermannia (2 members)
- Corethrogyne (1 member)
- Corispermum (14 members)
- Corispermum americanum (2 members)
- Corispermum hookeri (2 members)
- Corispermum ochotense (2 members)
- Cornaceae (2 members)
- Cornus (12 members)
- Cornus subg. Arctocrania (3 members)
- Cornus subg. Cornus (2 members)
- Cornus subg. Cynoxylon (2 members)
- Cornus subg. Mesomora (1 member)
- Cornus subg. Syncarpea (1 member)
- Cornus subg. Thelycrania (11 members)
- Corrigiola (2 members)
- Corrigiola litoralis (1 member)
- Cortaderia (2 members)
- Corydalis (14 members)
- Corydalis aurea (2 members)
- Corydalis caseana (5 members)
- Corydalis curvisiliqua (2 members)
- Corydalis micrantha (3 members)
- Corylus (4 members)
- Corylus cornuta (2 members)
- Corynephorus (1 member)
- Coryphantha (20 members)
- Coscinodon (5 members)
- Cosmos (4 members)
- Cota (1 member)
- Cotoneaster (34 members)
- Cottea (1 member)
- Cottsia (1 member)
- Cotula (2 members)
- Cotyledon (2 members)
- Cotyledon orbiculata (1 member)
- Count (80 members)
- Crambe (1 member)
- Cranichis (1 member)
- Crassula (12 members)
- Crassula colligata (1 member)
- Crassulaceae (36 members)
- Crataegus (30 members)
- Crataegus (sect. Brevispinae) ser. Brevispinae (1 member)
- Crataegus (sect. Coccineae) ser. Aestivales (3 members)
- Crataegus (sect. Coccineae) ser. Apricae (12 members)
- Crataegus (sect. Coccineae) ser. Bracteatae (2 members)
- Crataegus (sect. Coccineae) ser. Coccineae (4 members)
- Crataegus (sect. Coccineae) ser. Crus-galli (8 members)
- Crataegus (sect. Coccineae) ser. Dilatatae (1 member)
- Crataegus (sect. Coccineae) ser. Greggianae (1 member)
- Crataegus (sect. Coccineae) ser. Intricatae (14 members)
- Crataegus (sect. Coccineae) ser. Lacrimatae (24 members)
- Crataegus (sect. Coccineae) ser. Madrenses (1 member)
- Crataegus (sect. Coccineae) ser. Molles (8 members)
- Crataegus (sect. Coccineae) ser. Parvifoliae (2 members)
- Crataegus (sect. Coccineae) ser. Populneae (8 members)
- Crataegus (sect. Coccineae) ser. Pruinosae (7 members)
- Crataegus (sect. Coccineae) ser. Pulcherrimae (10 members)
- Crataegus (sect. Coccineae) ser. Punctatae (5 members)
- Crataegus (sect. Coccineae) ser. Rotundifoliae (11 members)
- Crataegus (sect. Coccineae) ser. Tenuifoliae (8 members)
- Crataegus (sect. Coccineae) ser. Triflorae (2 members)
- Crataegus (sect. Coccineae) ser. Virides (3 members)
- Crataegus (sect. Crataegus) ser. Apiifoliae (1 member)
- Crataegus (sect. Crataegus) ser. Cordatae (1 member)
- Crataegus (sect. Crataegus) ser. Crataegus (3 members)
- Crataegus (sect. Crataegus) ser. Microcarpae (1 member)
- Crataegus (sect. Douglasia) ser. Cerrones (3 members)
- Crataegus (sect. Douglasia) ser. Douglasianae (5 members)
- Crataegus (sect. Douglasia) ser. Purpureofructus (9 members)
- Crataegus (sect. Macracanthae) ser. Anomalae (4 members)
- Crataegus (sect. Macracanthae) ser. Macracanthae (6 members)
- Crataegus (sect. Sanguineae) ser. Altaicae (2 members)
- Crataegus (sect. Unassigned) ser. Montaninsulae (3 members)
- Crataegus berberifolia (2 members)
- Crataegus chrysocarpa (9 members)
- Crataegus coccinea (3 members)
- Crataegus collina (5 members)
- Crataegus crus-galli (2 members)
- Crataegus margarettae (4 members)
- Crataegus mollis (5 members)
- Crataegus monogyna (1 member)
- Crataegus okanaganensis (2 members)
- Crataegus ouachitensis (2 members)
- Crataegus padifolia (2 members)
- Crataegus pruinosa (6 members)
- Crataegus reverchonii (3 members)
- Crataegus scabrida (4 members)
- Crataegus schuettei (4 members)
- Crataegus sect. Brevispinae (2 members)
- Crataegus sect. Coccineae (40 members)
- Crataegus sect. Crataegus (8 members)
- Crataegus sect. Douglasia (6 members)
- Crataegus sect. Macracanthae (4 members)
- Crataegus sect. Sanguineae (2 members)
- Crataegus sect. Unassigned (2 members)
- Crataegus sheila-phippsiae (2 members)
- Crataegus succulenta (5 members)
- Crataegus texana (2 members)
- Crataegus viridis (6 members)
- Crataegus wattiana (1 member)
- Crataegus ×sicca (2 members)
- Cratoneuron (1 member)
- Crepis (28 members)
- Crepis bakeri (3 members)
- Crepis modocensis (4 members)
- Crepis occidentalis (4 members)
- Crepis runcinata (7 members)
- Crinum (5 members)
- Crinum americanum (2 members)
- Crocanthemum (16 members)
- Crocanthemum scoparium (2 members)
- Crocidium (1 member)
- Crocosmia (1 member)
- Croomia (1 member)
- Croptilon (4 members)
- Croptilon hookerianum (3 members)
- Crossidium (6 members)
- Crossidium crassinervium (1 member)
- Crossidium squamiferum (2 members)
- Crossopetalum (2 members)
- Crossosoma (2 members)
- Crossosomataceae (6 members)
- Croton (37 members)
- Croton alabamensis (2 members)
- Croton glandulosus (5 members)
- Croton leucophyllus (1 member)
- Croton lindheimerianus (2 members)
- Croton michauxii (2 members)
- Croton pottsii (2 members)
- Crumia (1 member)
- Crupina (1 member)
- Cryphaea (4 members)
- Cryphaeaceae (6 members)
- Crypsis (3 members)
- Cryptogramma (4 members)
- Ctenidium (2 members)
- Ctenitis (2 members)
- Ctenium (2 members)
- Ctenolepis (1 member)
- Cucumis (9 members)
- Cucumis anguria (2 members)
- Cucumis melo (2 members)
- Cucumis sativus (1 member)
- Cucurbita (12 members)
- Cucurbita melopepo (4 members)
- Cucurbita melopepo subsp. melopepo (1 member)
- Cucurbita melopepo subsp. texana (2 members)
- Cucurbita okeechobeensis (1 member)
- Cucurbita pepo (1 member)
- Cucurbitaceae (46 members)
- Cuniculotinus (1 member)
- Cuphea (6 members)
- Cupressaceae (18 members)
- Cupressus (8 members)
- Cupressus guadalupensis (1 member)
- Curcuma (1 member)
- Cusickiella (2 members)
- Cutandia (1 member)
- Cyanthillium (1 member)
- Cycadophyta (1 member)
- Cyclachaena (1 member)
- Cyclanthera (4 members)
- Cyclodictyon (1 member)
- Cycloloma (1 member)
- Cyclopogon (2 members)
- Cydonia (1 member)
- Cylindropuntia (27 members)
- Cylindropuntia acanthocarpa (4 members)
- Cylindropuntia bigelovii (1 member)
- Cylindropuntia californica (2 members)
- Cylindropuntia fulgida (2 members)
- Cylindropuntia imbricata (2 members)
- Cymbalaria (2 members)
- Cymbalaria muralis (1 member)
- Cymbopogon (3 members)
- Cymodoceaceae (4 members)
- Cymophyllus (1 member)
- Cynara (2 members)
- Cynara cardunculus (2 members)
- Cynodon (9 members)
- Cynodon dactylon (2 members)
- Cynodontium (9 members)
- Cynophalla (1 member)
- Cynosurus (2 members)
- Cyperaceae (54 members)
- Cyperus (10 members)
- Cyperus esculentus (3 members)
- Cyperus lupulinus (2 members)
- Cyperus manimae (1 member)
- Cyperus subg. Cyperus (62 members)
- Cyperus subg. Diclidium (2 members)
- Cyperus subg. Juncellus (2 members)
- Cyperus subg. Pycnostachys (22 members)
- Cyperus subg. Pycreus (11 members)
- Cyphomeris (2 members)
- Cypripedium (13 members)
- Cypripedium parviflorum (3 members)
- Cypselea (1 member)
- Cyrilla (1 member)
- Cyrillaceae (4 members)
- Cyrto-hypnum (4 members)
- Cyrtomium (3 members)
- Cyrtomium fortunei (1 member)
- Cyrtomnium (2 members)
- Cyrtopodium (2 members)
- Cystopteris (9 members)
- Dacryophyllum (1 member)
- Dactylis (1 member)
- Dactyloctenium (3 members)
- Dactylorhiza (3 members)
- Dactylorhiza majalis (1 member)
- Dalechampia (1 member)
- Daltonia (1 member)
- Daltoniaceae (2 members)
- Damasonium (1 member)
- Danthonia (8 members)
- Daphne (2 members)
- Darlingtonia (1 member)
- Darmera (1 member)
- Dasiphora (1 member)
- Dasistoma (1 member)
- Dasylirion (3 members)
- Dasyochloa (1 member)
- Dasypyrum (1 member)
- Datisca (1 member)
- Datiscaceae (2 members)
- Decodon (1 member)
- Decumaria (1 member)
- Dedeckera (1 member)
- Deeringothamnus (2 members)
- Deinandra (17 members)
- Deinandra increscens (2 members)
- Deiregyne (1 member)
- Delairea (1 member)
- Delosperma (1 member)
- Delphinium (4 members)
- Delphinium bicolor (2 members)
- Delphinium californicum (2 members)
- Delphinium carolinianum (4 members)
- Delphinium decorum (2 members)
- Delphinium gypsophilum (2 members)
- Delphinium hansenii (3 members)
- Delphinium hesperium (3 members)
- Delphinium menziesii (2 members)
- Delphinium nuttallii (2 members)
- Delphinium parishii (3 members)
- Delphinium parryi (5 members)
- Delphinium patens (3 members)
- Delphinium sect. Diedropetala (18 members)
- Delphinium sect. Elatopsis (2 members)
- Delphinium subsect. Bicoloria (7 members)
- Delphinium subsect. Depauperata (3 members)
- Delphinium subsect. Echinata (7 members)
- Delphinium subsect. Elata (1 member)
- Delphinium subsect. Exaltata (13 members)
- Delphinium subsect. Grumosa (17 members)
- Delphinium subsect. Multiplex (4 members)
- Delphinium subsect. Subscaposa (13 members)
- Delphinium subsect. Virescens (4 members)
- Delphinium subsect. Wislizenana (5 members)
- Delphinium variegatum (3 members)
- Dendroalsia (1 member)
- Dendromecon (2 members)
- Dendrophylax (1 member)
- Dennstaedtia (3 members)
- Dennstaedtiaceae (8 members)
- Deparia (2 members)
- Deschampsia (9 members)
- Deschampsia cespitosa (3 members)
- Descurainia (16 members)
- Descurainia incisa (2 members)
- Descurainia pinnata (4 members)
- Desmazeria (2 members)
- Deutzia (3 members)
- Diameter (12 members)
- Diamorpha (1 member)
- Dianella (1 member)
- Dianthus (10 members)
- Dianthus armeria (1 member)
- Dianthus barbatus (1 member)
- Dianthus deltoides (1 member)
- Dianthus plumarius (1 member)
- Diapensia (2 members)
- Diapensiaceae (8 members)
- Diaperia (5 members)
- Diaperia prolifera (2 members)
- Diaperia verna (2 members)
- Diarrhena (2 members)
- Dicentra (10 members)
- Dicentra formosa (2 members)
- Dichaetophora (1 member)
- Dichanthelium (26 members)
- Dichanthelium aciculare (4 members)
- Dichanthelium acuminatum (10 members)
- Dichanthelium chamaelonche (2 members)
- Dichanthelium commutatum (4 members)
- Dichanthelium dichotomum (7 members)
- Dichanthelium ensifolium (2 members)
- Dichanthelium oligosanthes (2 members)
- Dichanthelium ovale (4 members)
- Dichanthelium portoricense (2 members)
- Dichanthelium sect. Angustifolia (3 members)
- Dichanthelium sect. Clandestina (3 members)
- Dichanthelium sect. Dichanthelium (3 members)
- Dichanthelium sect. Ensifolia (5 members)
- Dichanthelium sect. Lancearia (2 members)
- Dichanthelium sect. Lanuginosa (5 members)
- Dichanthelium sect. Linearifolia (4 members)
- Dichanthelium sect. Macrocarpa (6 members)
- Dichanthelium sect. Nudicaulia (1 member)
- Dichanthelium sect. Oligosantha (4 members)
- Dichanthelium sect. Pedicellata (2 members)
- Dichanthelium sect. Sphaerocarpa (3 members)
- Dichanthelium sect. Strigosa (3 members)
- Dichanthelium strigosum (3 members)
- Dichanthium (3 members)
- Dichelostemma (6 members)
- Dichelostemma capitatum (2 members)
- Dichelyma (4 members)
- Dichodontium (2 members)
- Dichromanthus (1 member)
- Dicoria (1 member)
- Dicranaceae (34 members)
- Dicranella (11 members)
- Dicranocarpus (1 member)
- Dicranodontium (3 members)
- Dicranopteris (1 member)
- Dicranostegia (1 member)
- Dicranoweisia (2 members)
- Dicranum (28 members)
- Dicranum fuscescens (2 members)
- Dicranum majus (2 members)
- Didiplis (1 member)
- Didymodon (28 members)
- Didymodon rigidulus (5 members)
- Didymodon vinealis (2 members)
- Dieteria (6 members)
- Dieteria asteroides (3 members)
- Dieteria bigelovii (3 members)
- Dieteria canescens (10 members)
- Digitalis (5 members)
- Digitalis purpurea (1 member)
- Digitaria (33 members)
- Digitaria eriantha (2 members)
- Digitaria filiformis (4 members)
- Dimeresia (1 member)
- Dimorphocarpa (3 members)
- Dimorphotheca (2 members)
- Dinebra (1 member)
- Dionaea (1 member)
- Dioscorea (6 members)
- Dioscoreaceae (2 members)
- Diospyros (4 members)
- Diphasiastrum (5 members)
- Diphylleia (1 member)
- Diphysciaceae (2 members)
- Diphyscium (2 members)
- Diplacus (49 members)
- Diplacus bigelovii (2 members)
- Diplazium (3 members)
- Diplotaxis (3 members)
- Dirca (3 members)
- Disceliaceae (2 members)
- Discelium (1 member)
- Dissanthelium (1 member)
- Distance (5 members)
- Distichium (3 members)
- Distichlis (1 member)
- Dithyrea (2 members)
- Ditrichaceae (18 members)
- Ditrichum (11 members)
- Ditrysinia (1 member)
- Dittrichia (1 member)
- Dodecahema (1 member)
- Dodecatheon (20 members)
- Dodecatheon clevelandii (4 members)
- Dodecatheon conjugens (2 members)
- Dodecatheon pulchellum (7 members)
- Doellingeria (4 members)
- Doellingeria umbellata (2 members)
- Donnellia (1 member)
- Donrichardsia (2 members)
- Dopatrium (1 member)
- Doronicum (3 members)
- Dorstenia (1 member)
- Douglasia (9 members)
- Draba (123 members)
- Draba asprella (2 members)
- Draba cuneifolia (3 members)
- Drepanocladus (7 members)
- Drosanthemum (1 member)
- Drosera (8 members)
- Droseraceae (4 members)
- Drummondia (1 member)
- Dryas (9 members)
- Dryas ajanensis (1 member)
- Dryas integrifolia (2 members)
- Drymaria (13 members)
- Drymaria cordata (1 member)
- Drymaria effusa (1 member)
- Drymaria glandulosa (1 member)
- Drymaria leptophylla (1 member)
- Drymocallis (19 members)
- Drymocallis cuneifolia (2 members)
- Drymocallis glandulosa (4 members)
- Drymocallis lactea (2 members)
- Drymocallis pseudorupestris (3 members)
- Dryopetalon (2 members)
- Dryopteridaceae (36 members)
- Dryopteris (15 members)
- Drypetes (2 members)
- Duchesnea (2 members)
- Duchesnea indica (1 member)
- Dudleya (6 members)
- Dudleya abramsii (7 members)
- Dudleya attenuata (1 member)
- Dudleya blochmaniae (2 members)
- Dudleya cymosa (8 members)
- Dudleya saxosa (3 members)
- Dudleya subg. Dudleya (18 members)
- Dudleya subg. Hasseanthus (6 members)
- Dudleya subg. Stylophyllum (8 members)
- Dudleya virens (3 members)
- Dulichium (2 members)
- Dulichium arundinaceum (2 members)
- Dupontia (1 member)
- Dypsis (1 member)
- Dysodiopsis (1 member)
- Dysphania (6 members)
- Dysphania sect. Adenois (4 members)
- Dysphania sect. Botryoides (6 members)
- Dysphania sect. Orthospora (3 members)
- Dysphania subsect. Botrys (1 member)
- Dysphania subsect. Incisa (1 member)
- Dysphania subsect. Teloxys (1 member)
- Dyssodia (1 member)
- Eastwoodia (1 member)
- Eatonella (1 member)
- Ebenaceae (2 members)
- Ecballium (1 member)
- Eccremidium (1 member)
- Echeandia (3 members)
- Echeveria (1 member)
- Echinacea (10 members)
- Echinacea paradoxa (2 members)
- Echinocactus (4 members)
- Echinocactus polycephalus (2 members)
- Echinocereus (27 members)
- Echinocereus enneacanthus (2 members)
- Echinocereus pectinatus (1 member)
- Echinocereus rigidissimus (1 member)
- Echinocereus stramineus (1 member)
- Echinochloa (15 members)
- Echinochloa crus-pavonis (2 members)
- Echinochloa muricata (2 members)
- Echinocystis (1 member)
- Echinodorus (5 members)
- Echinodorus cordifolius (1 member)
- Echinomastus (7 members)
- Echinomastus erectocentrus (2 members)
- Echinomastus intertextus (2 members)
- Echinopepon (2 members)
- Echinophyllum (1 member)
- Echinops (4 members)
- Echinops ritro (1 member)
- Eclipta (1 member)
- Edgeworthia (1 member)
- Egeria (1 member)
- Egletes (1 member)
- Ehrharta (3 members)
- Eichhornia (2 members)
- Elaeagnaceae (6 members)
- Elaeagnus (5 members)
- Elaeis (1 member)
- Elatinaceae (4 members)
- Elatine (10 members)
- Eleocharis (12 members)
- Eleocharis (sect. Eleocharis) ser. Albidae (1 member)
- Eleocharis (sect. Eleocharis) ser. Eleocharis (25 members)
- Eleocharis (sect. Eleocharis) ser. Melanocarpae (1 member)
- Eleocharis (sect. Eleocharis) ser. Rostellatae (1 member)
- Eleocharis (sect. Eleocharis) ser. Tenuissimae (14 members)
- Eleocharis (sect. Eleogenus) ser. Maculosae (4 members)
- Eleocharis (sect. Eleogenus) ser. Ovatae (6 members)
- Eleocharis compressa (2 members)
- Eleocharis flavescens (2 members)
- Eleocharis mamillata (1 member)
- Eleocharis microcarpa (2 members)
- Eleocharis sect. Eleocharis (10 members)
- Eleocharis sect. Eleogenus (4 members)
- Eleocharis sect. Parvulae (2 members)
- Eleocharis subg. Eleocharis (1 member)
- Eleocharis subg. Limnochloa (7 members)
- Eleocharis subg. Scirpidium (7 members)
- Eleocharis subg. Zinserlingia (4 members)
- Eleocharis tenuis (3 members)
- Elephantopus (4 members)
- Eleusine (4 members)
- Eleusine coracana (2 members)
- Elionurus (2 members)
- Elliottia (2 members)
- Elmera (1 member)
- Elodea (3 members)
- Elodium (3 members)
- Eltroplectris (1 member)
- Elymus (55 members)
- Elymus alaskanus (2 members)
- Elymus canadensis (3 members)
- Elymus elymoides (4 members)
- Elymus glaucus (3 members)
- Elymus lanceolatus (3 members)
- Elymus stebbinsii (2 members)
- Elymus trachycaulus (3 members)
- Elymus virginicus (4 members)
- Embryophyta (304 members)
- Emex (2 members)
- Emilia (2 members)
- Emorya (1 member)
- Empetrum (3 members)
- Encalypta (14 members)
- Encalyptaceae (4 members)
- Encelia (8 members)
- Enceliopsis (3 members)
- Encyclia (1 member)
- Enemion (5 members)
- Engelmannia (1 member)
- Enneapogon (2 members)
- Enteropogon (3 members)
- Entodon (10 members)
- Entodontaceae (2 members)
- Entodontopsis (1 member)
- Entosthodon (12 members)
- Ephedra (12 members)
- Ephedraceae (2 members)
- Ephemeraceae (4 members)
- Ephemerum (5 members)
- Ephemerum crassinervium (2 members)
- Epidendrum (7 members)
- Epifagus (1 member)
- Epigaea (1 member)
- Epilobium (17 members)
- Epilobium canum (3 members)
- Epilobium ciliatum (3 members)
- Epilobium glaberrimum (2 members)
- Epilobium hornemannii (2 members)
- Epilobium sect. Cordylophorum (3 members)
- Epilobium sect. Crossostigma (2 members)
- Epilobium sect. Epilobiopsis (2 members)
- Epilobium sect. Epilobium (30 members)
- Epilobium sect. Macrocarpa (1 member)
- Epilobium sect. Pachydium (3 members)
- Epilobium sect. Xerolobium (1 member)
- Epilobium sect. Zauschneria (3 members)
- Epilobium subsect. Nuttalia (1 member)
- Epilobium subsect. Petrolobium (2 members)
- Epipactis (3 members)
- Epiphyllum (2 members)
- Epiphyllum phyllanthus (1 member)
- Epipterygium (1 member)
- Epithelantha (3 members)
- Epithelantha micromeris (1 member)
- Epixiphium (1 member)
- Equisetaceae (2 members)
- Equisetophyta (1 member)
- Equisetum (4 members)
- Equisetum hyemale (1 member)
- Equisetum ramosissimum (1 member)
- Equisetum subg. Equisetum (11 members)
- Equisetum subg. Hippochaete (8 members)
- Equisetum telmateia (1 member)
- Equisetum variegatum (2 members)
- Eragrostis (53 members)
- Eragrostis ciliaris (2 members)
- Eragrostis mexicana (2 members)
- Eragrostis pectinacea (3 members)
- Eragrostis pilosa (2 members)
- Eranthis (1 member)
- Erechtites (4 members)
- Erechtites hieraciifolius (2 members)
- Eremalche (4 members)
- Eremalche parryi (2 members)
- Eremochloa (2 members)
- Eremocrinum (1 member)
- Eremogone (21 members)
- Eremogone capillaris (2 members)
- Eremogone congesta (9 members)
- Eremogone eastwoodiae (2 members)
- Eremogone franklinii (2 members)
- Eremogone hookeri (2 members)
- Eremogone kingii (2 members)
- Eremogone macradenia (2 members)
- Eremopoa (1 member)
- Eremopyrum (3 members)
- Eremothera (8 members)
- Eremothera boothii (6 members)
- Erica (4 members)
- Ericaceae (12 members)
- Ericaceae subfam. Arbutoideae (12 members)
- Ericaceae subfam. Cassiopoideae (2 members)
- Ericaceae subfam. Ericoideae (28 members)
- Ericaceae subfam. Harrimanelloideae (2 members)
- Ericaceae subfam. Monotropoideae (24 members)
- Ericaceae subfam. Vaccinioideae (24 members)
- Ericameria (40 members)
- Ericameria cooperi (1 member)
- Ericameria cuneata (3 members)
- Ericameria nauseosa (21 members)
- Ericameria palmeri (2 members)
- Ericameria parishii (1 member)
- Ericameria parryi (12 members)
- Erigeron (199 members)
- Erigeron acris (1 member)
- Erigeron aphanactis (2 members)
- Erigeron bellidiastrum (3 members)
- Erigeron bloomeri (2 members)
- Erigeron breweri (5 members)
- Erigeron chrysopsidis (3 members)
- Erigeron clokeyi (2 members)
- Erigeron concinnus (3 members)
- Erigeron eatonii (6 members)
- Erigeron foliosus (5 members)
- Erigeron formosissimus (2 members)
- Erigeron glabellus (2 members)
- Erigeron glacialis (2 members)
- Erigeron inornatus (3 members)
- Erigeron lassenianus (2 members)
- Erigeron peregrinus (2 members)
- Erigeron petrophilus (3 members)
- Erigeron philadelphicus (3 members)
- Erigeron poliospermus (3 members)
- Erigeron pulchellus (3 members)
- Erigeron pumilus (2 members)
- Erigeron reductus (2 members)
- Erigeron sionis (2 members)
- Erigeron strigosus (4 members)
- Erigeron uncialis (2 members)
- Erigeron uniflorus (1 member)
- Eriobotrya (1 member)
- Eriocaulaceae (6 members)
- Eriocaulon (11 members)
- Eriochloa (13 members)
- Eriochloa acuminata (2 members)
- Eriochloa michauxii (2 members)
- Eriogonum (18 members)
- Eriogonum alatum (2 members)
- Eriogonum apricum (2 members)
- Eriogonum arcuatum (3 members)
- Eriogonum atrorubens (1 member)
- Eriogonum baileyi (2 members)
- Eriogonum breedlovei (2 members)
- Eriogonum brevicaule (8 members)
- Eriogonum cithariforme (2 members)
- Eriogonum compositum (3 members)
- Eriogonum corymbosum (8 members)
- Eriogonum deflexum (3 members)
- Eriogonum douglasii (3 members)
- Eriogonum elatum (2 members)
- Eriogonum elongatum (1 member)
- Eriogonum esmeraldense (2 members)
- Eriogonum fasciculatum (4 members)
- Eriogonum flavum (3 members)
- Eriogonum giganteum (3 members)
- Eriogonum gracile (2 members)
- Eriogonum grande (3 members)
- Eriogonum heermannii (8 members)
- Eriogonum hemipterum (1 member)
- Eriogonum heracleoides (2 members)
- Eriogonum hoffmannii (2 members)
- Eriogonum inerme (2 members)
- Eriogonum jamesii (3 members)
- Eriogonum kennedyi (5 members)
- Eriogonum lachnogynum (3 members)
- Eriogonum leptocladon (3 members)
- Eriogonum longifolium (3 members)
- Eriogonum luteolum (4 members)
- Eriogonum marifolium (2 members)
- Eriogonum microtheca (13 members)
- Eriogonum microthecum (0 members)
- Eriogonum multiflorum (2 members)
- Eriogonum nudum (13 members)
- Eriogonum nutans (2 members)
- Eriogonum ochrocephalum (2 members)
- Eriogonum ovalifolium (11 members)
- Eriogonum panguicense (2 members)
- Eriogonum pharnaceoides (2 members)
- Eriogonum prattenianum (2 members)
- Eriogonum prociduum (2 members)
- Eriogonum pyrolifolium (2 members)
- Eriogonum rosense (2 members)
- Eriogonum spergulinum (3 members)
- Eriogonum sphaerocephalum (4 members)
- Eriogonum strictum (4 members)
- Eriogonum subg. Clastomyelon (1 member)
- Eriogonum subg. Eriogonum (3 members)
- Eriogonum subg. Eucycla (125 members)
- Eriogonum subg. Ganysma (60 members)
- Eriogonum subg. Micrantha (3 members)
- Eriogonum subg. Oligogonum (44 members)
- Eriogonum subg. Oregonium (30 members)
- Eriogonum subg. Pterogonum (9 members)
- Eriogonum tenellum (3 members)
- Eriogonum thompsoniae (3 members)
- Eriogonum umbellatum (41 members)
- Eriogonum ursinum (2 members)
- Eriogonum wrightii (6 members)
- Eriogonum zionis (2 members)
- Erioneuron (3 members)
- Eriophorum (12 members)
- Eriophorum angustifolium (2 members)
- Eriophyllum (16 members)
- Eriophyllum ambiguum (2 members)
- Eriophyllum confertiflorum (2 members)
- Eriophyllum lanatum (10 members)
- Erpodiaceae (6 members)
- Erpodium (2 members)
- Eruca (2 members)
- Eruca vesicaria (1 member)
- Erucastrum (1 member)
- Erysimum (20 members)
- Erysimum capitatum (2 members)
- Erythranthe (86 members)
- Erythronium (26 members)
- Erythronium americanum (2 members)
- Erythronium grandiflorum (2 members)
- Erythronium umbilicatum (2 members)
- Eschscholzia (12 members)
- Eschscholzia californica (2 members)
- Eschscholzia lemmonii (2 members)
- Eubotrys (2 members)
- Eucalyptus (15 members)
- Eucephalus (11 members)
- Eucephalus ledophyllus (2 members)
- Euchiton (3 members)
- Eucladium (1 member)
- Euclidium (1 member)
- Eucnide (5 members)
- Eucnide bartonioides (2 members)
- Eucommia (1 member)
- Eucommiaceae (2 members)
- Eugenia (5 members)
- Eulobus (1 member)
- Eulophia (1 member)
- Euonymus (8 members)
- Euonymus occidentalis (2 members)
- Eupatorium (28 members)
- Eupatorium album (3 members)
- Eupatorium hyssopifolium (2 members)
- Eupatorium leucolepis (2 members)
- Eupatorium rotundifolium (3 members)
- Euphorbia (12 members)
- Euphorbia austrotexana (2 members)
- Euphorbia chaetocalyx (2 members)
- Euphorbia deltoidea (4 members)
- Euphorbia geyeri (2 members)
- Euphorbia inundata (2 members)
- Euphorbia ocellata (2 members)
- Euphorbia pediculifera (1 member)
- Euphorbia polycarpa (1 member)
- Euphorbia sect. Alectoroctonum (21 members)
- Euphorbia sect. Anisophyllum (77 members)
- Euphorbia sect. Crepidaria (2 members)
- Euphorbia sect. Nummulariopsis (5 members)
- Euphorbia sect. Poinsettia (10 members)
- Euphorbia serpillifolia (2 members)
- Euphorbia subg. Esula (35 members)
- Euphorbia theriaca (2 members)
- Euphorbia tithymaloides (1 member)
- Euphorbiaceae (48 members)
- Euphrasia (22 members)
- Euphrasia arctica (2 members)
- Euphrasia oakesii (2 members)
- Euphrasia salisburgensis (1 member)
- Euphrasia stricta (2 members)
- Eurhynchiastrum (2 members)
- Eurhynchiastrum pulchellum (2 members)
- Eurybia (23 members)
- Eustachys (7 members)
- Euthamia (5 members)
- Eutrema (2 members)
- Eutrochium (7 members)
- Eutrochium maculatum (3 members)
- Eutrochium purpureum (2 members)
- Exochorda (1 member)
- Exudation (22 members)
- Fabronia (2 members)
- Fabroniaceae (2 members)
- Facelis (1 member)
- Fagaceae (10 members)
- Fagonia (3 members)
- Fagopyrum (2 members)
- Fagus (1 member)
- Fallopia (9 members)
- Fallopia japonica (1 member)
- Fallugia (1 member)
- Fatoua (1 member)
- Fendlera (2 members)
- Fendlerella (1 member)
- Ferocactus (7 members)
- Ferocactus hamatacanthus (2 members)
- Ferocactus viridescens (1 member)
- Festuca (9 members)
- Festuca brachyphylla (3 members)
- Festuca californica (3 members)
- Festuca rubra (10 members)
- Festuca saximontana (3 members)
- Festuca sect. Breviaristatae (7 members)
- Festuca sect. Elmera (1 member)
- Festuca sect. Festuca (35 members)
- Festuca sect. Subulatae (2 members)
- Festuca sect. Subuliflorae (1 member)
- Festuca sect. Texanae (1 member)
- Festuca subg. Festuca (4 members)
- Festuca subg. Montanae (2 members)
- Festuca subg. Obtusae (1 member)
- Festuca subg. Subulatae (6 members)
- Festuca viviparoidea (2 members)
- Ficus (10 members)
- Filago (3 members)
- Filago pyramidata (1 member)
- Filipendula (4 members)
- Fimbristylis (17 members)
- Fimbristylis puberula (2 members)
- Fingerhuthia (1 member)
- Firmiana (1 member)
- Fissidens (40 members)
- Fissidens closteri (1 member)
- Fissidens pellucidus (1 member)
- Fissidens serratus (1 member)
- Fissidentaceae (2 members)
- Flacourtia (1 member)
- Flaveria (8 members)
- Fleischmannia (2 members)
- Floerkea (1 member)
- Florestina (1 member)
- Flourensia (2 members)
- Flueggea (2 members)
- Flueggea virosa (1 member)
- Flyriella (1 member)
- Fontinalaceae (6 members)
- Fontinalis (10 members)
- Forsstroemia (2 members)
- Fothergilla (2 members)
- Fragaria (6 members)
- Fragaria chiloensis (2 members)
- Fragaria vesca (4 members)
- Fragaria virginiana (4 members)
- Frangula (10 members)
- Frangula californica (6 members)
- Frangula purshiana (3 members)
- Frangula rubra (5 members)
- Frankenia (5 members)
- Frankeniaceae (2 members)
- Franklinia (1 member)
- Freesia (2 members)
- Fremontodendron (3 members)
- Fritillaria (21 members)
- Fritillaria biflora (2 members)
- Froelichia (5 members)
- Fryxellia (1 member)
- Fuchsia (1 member)
- Fuirena (8 members)
- Fuirena simplex (2 members)
- Fumaria (3 members)
- Fumariaceae (8 members)
- Funaria (10 members)
- Funaria hygrometrica (2 members)
- Funariaceae (12 members)
- Furcraea (2 members)
- Gaillardia (11 members)
- Galanthus (2 members)
- Galax (1 member)
- Galeandra (1 member)
- Galearis (1 member)
- Galenia (2 members)
- Galinsoga (3 members)
- Galinsoga parviflora (2 members)
- Galphimia (1 member)
- Gambelia (1 member)
- Gamochaeta (12 members)
- Garberia (1 member)
- Garrya (8 members)
- Garryaceae (4 members)
- Gastridium (1 member)
- Gaudinia (1 member)
- Gaultheria (6 members)
- Gaylussacia (10 members)
- Gayophytum (9 members)
- Gayophytum diffusum (2 members)
- Gazania (1 member)
- Gemmabryum (6 members)
- Gemmabryum sect. Caespitibryum (3 members)
- Gemmabryum sect. Gemmabryum (7 members)
- Gemmabryum sect. Tuberibryum (9 members)
- Geocarpon (1 member)
- Geocaulon (1 member)
- Geraea (2 members)
- Geum (18 members)
- Geum macrophyllum (2 members)
- Geum triflorum (2 members)
- Gibasis (1 member)
- Gigaspermaceae (2 members)
- Gillenia (2 members)
- Gilmania (1 member)
- Ginkgo (1 member)
- Ginkgoaceae (2 members)
- Ginkgophyta (1 member)
- Gisekia (1 member)
- Gladiolus (5 members)
- Gladiolus dalenii (1 member)
- Glandulicactus (2 members)
- Glandulicactus uncinatus (1 member)
- Glaucium (2 members)
- Glebionis (2 members)
- Gleicheniaceae (2 members)
- Glinus (2 members)
- Globulinella (1 member)
- Glochidion (1 member)
- Glossopetalon (5 members)
- Glossopetalon spinescens (5 members)
- Glossostigma (1 member)
- Glyceria (6 members)
- Glyceria canadensis (2 members)
- Glyceria grandis (2 members)
- Glyceria sect. Glyceria (9 members)
- Glyceria sect. Hydropoa (4 members)
- Glyceria sect. Striatae (8 members)
- Glyceria septentrionalis (2 members)
- Glyptopleura (2 members)
- Gnaphalium (3 members)
- Gnetophyta (1 member)
- Gochnatia (1 member)
- Gollania (1 member)
- Gomphrena (9 members)
- Goodmania (1 member)
- Goodyera (4 members)
- Gordonia (1 member)
- Gossypianthus (2 members)
- Gossypianthus lanuginosus (2 members)
- Gossypium (3 members)
- Gouania (1 member)
- Govenia (1 member)
- Grammitidaceae (2 members)
- Grammitis (1 member)
- Graptopetalum (2 members)
- Gratiola (13 members)
- Grayia (1 member)
- Grevillea (1 member)
- Grimmia (10 members)
- Grimmia subg. Grimmia (4 members)
- Grimmia subg. Guembelia (13 members)
- Grimmia subg. Litoneuron (7 members)
- Grimmia subg. Rhabdogrimmia (17 members)
- Grimmia subg. Undetermined (2 members)
- Grimmiaceae (5 members)
- Grimmiaceae subfam. Grimmioideae (10 members)
- Grimmiaceae subfam. Racomitrioideae (7 members)
- Grindelia (18 members)
- Grossulariaceae (2 members)
- Groutiella (2 members)
- Growth form (351 members)
- Grusonia (8 members)
- Guaiacum (2 members)
- Guapira (2 members)
- Guardiola (1 member)
- Guilleminea (2 members)
- Guilleminea densa (1 member)
- Guizotia (1 member)
- Gundlachia (1 member)
- Gunnera (1 member)
- Gunneraceae (2 members)
- Gutierrezia (11 members)
- Gutierrezia texana (2 members)
- Guzmania (2 members)
- Guzmania monostachia (2 members)
- Gyminda (1 member)
- Gymnanthes (1 member)
- Gymnocarpium (6 members)
- Gymnocarpium jessoense (1 member)
- Gymnopogon (3 members)
- Gymnosperma (1 member)
- Gymnosperms (4 members)
- Gymnostomiella (1 member)
- Gymnostomum (3 members)
- Gynandropsis (1 member)
- Gynerium (1 member)
- Gynura (1 member)
- Gypsophila (4 members)
- Gyroweisia (1 member)
- Habenaria (4 members)
- Habranthus (2 members)
- Hackelochloa (2 members)
- Haemodoraceae (4 members)
- Hageniella (1 member)
- Hainardia (1 member)
- Hakonechloa (1 member)
- Halesia (2 members)
- Halimolobos (3 members)
- Halodule (1 member)
- Halogeton (1 member)
- Halophila (3 members)
- Haloragaceae (6 members)
- Haloragis (2 members)
- Haloragis erecta (1 member)
- Hamamelidaceae (6 members)
- Hamamelis (2 members)
- Hamatocactus (1 member)
- Hamatocaulis (2 members)
- Haplocladium (3 members)
- Haplodontium (2 members)
- Haploësthes (2 members)
- Haploësthes greggii (1 member)
- Harmonia (5 members)
- Harperocallis (1 member)
- Harrimanella (2 members)
- Harrisella (1 member)
- Harrisia (3 members)
- Hartwrightia (1 member)
- Hasteola (2 members)
- Hastingsia (4 members)
- Hazardia (9 members)
- Hazardia squarrosa (3 members)
- Hazardia whitneyi (2 members)
- Hebecarpa (7 members)
- Hecastocleis (1 member)
- Hechtia (2 members)
- Hedosyne (1 member)
- Hedwigia (3 members)
- Hedwigiaceae (6 members)
- Hedychium (1 member)
- Hedypnois (1 member)
- Height (1 member)
- Heimia (1 member)
- Helenium (21 members)
- Helenium amarum (2 members)
- Helenium elegans (2 members)
- Helenium microcephalum (2 members)
- Helianthella (7 members)
- Helianthella californica (3 members)
- Helianthus (59 members)
- Helianthus debilis (5 members)
- Helianthus niveus (1 member)
- Helianthus nuttallii (3 members)
- Helianthus occidentalis (2 members)
- Helianthus pauciflorus (2 members)
- Helianthus petiolaris (2 members)
- Helianthus praecox (3 members)
- Helichrysum (1 member)
- Heliconia (1 member)
- Heliconiaceae (2 members)
- Helictotrichon (2 members)
- Heliomeris (6 members)
- Heliomeris longifolia (2 members)
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- Heliopsis (4 members)
- Heliopsis helianthoides (2 members)
- Helleborus (1 member)
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- Helodiaceae (4 members)
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- Hemerocallis (2 members)
- Hemiscola (3 members)
- Hemiscola aculeata (1 member)
- Hemitomes (1 member)
- Hemizonella (1 member)
- Hemizonia (2 members)
- Hemizonia congesta (6 members)
- Henicodium (1 member)
- Hennediella (3 members)
- Hennediella heimii (2 members)
- Herbertia (1 member)
- Herissantia (1 member)
- Hermannia (2 members)
- Hermbstaedtia (1 member)
- Herniaria (3 members)
- Herniaria hirsuta (2 members)
- Herpetineuron (1 member)
- Herrickia (6 members)
- Herrickia glauca (2 members)
- Herrickia kingii (2 members)
- Herzogiella (4 members)
- Hesperaloe (2 members)
- Hesperevax (5 members)
- Hesperevax acaulis (3 members)
- Hesperevax sparsiflora (2 members)
- Hesperidanthus (5 members)
- Hesperis (1 member)
- Hesperocallis (1 member)
- Hesperocnide (1 member)
- Hesperolinon (13 members)
- Hesperomecon (1 member)
- Hesperostipa (5 members)
- Hesperostipa comata (2 members)
- Hesperoyucca (2 members)
- Heteranthemis (1 member)
- Heteranthera (6 members)
- Heterocladium (3 members)
- Heteromeles (1 member)
- Heterophyllium (1 member)
- Heteropogon (2 members)
- Heteropterys (1 member)
- Heterosavia (1 member)
- Heterosperma (1 member)
- Heterotheca (24 members)
- Heterotheca camporum (2 members)
- Heterotheca fulcrata (4 members)
- Heterotheca oregona (4 members)
- Heterotheca sessiliflora (4 members)
- Heterotheca stenophylla (2 members)
- Heterotheca subaxillaris (2 members)
- Heterotheca villosa (9 members)
- Heuchera (36 members)
- Heuchera americana (3 members)
- Heuchera micrantha (5 members)
- Heuchera parviflora (2 members)
- Heuchera villosa (2 members)
- Hexalectris (6 members)
- Hexalectris spicata (2 members)
- Hexastylis (11 members)
- Hexastylis arifolia (3 members)
- Hexastylis shuttleworthii (2 members)
- Hibiscus (24 members)
- Hibiscus clypeatus (1 member)
- Hibiscus moscheutos (2 members)
- Hibiscus striatus (1 member)
- Hidden categories (1 member)
- Hieracium (36 members)
- Hilaria (6 members)
- Hilaria belangeri (2 members)
- Hilpertia (1 member)
- Hippeastrum (1 member)
- Hippocratea (1 member)
- Hippomane (1 member)
- Hippophaë (1 member)
- Hippuris (4 members)
- Hiptage (1 member)
- Hirschfeldia (1 member)
- Holcus (2 members)
- Hollisteria (1 member)
- Holmgrenanthe (1 member)
- Holocarpha (5 members)
- Holocarpha virgata (2 members)
- Holodiscus (4 members)
- Holodiscus discolor (2 members)
- Holodiscus microphyllus (3 members)
- Holosteum (2 members)
- Holosteum umbellatum (1 member)
- Holozonia (1 member)
- Homalia (2 members)
- Homalia trichomanoides (1 member)
- Homaliadelphus (1 member)
- Homalotheciella (1 member)
- Homalothecium (9 members)
- Homomallium (4 members)
- Homomallium mexicanum (2 members)
- Honckenya (2 members)
- Honckenya peploides (3 members)
- Hookeria (2 members)
- Hookeriaceae (2 members)
- Hordeum (15 members)
- Hordeum brachyantherum (2 members)
- Hordeum jubatum (2 members)
- Hordeum marinum (2 members)
- Hordeum murinum (3 members)
- Horkelia (10 members)
- Horkelia californica (3 members)
- Horkelia clevelandii (1 member)
- Horkelia congesta (2 members)
- Horkelia cuneata (3 members)
- Horkelia daucifolia (3 members)
- Horkelia fusca (7 members)
- Horkelia sect. Capitatae (2 members)
- Horkelia sect. Hispidulae (3 members)
- Horkelia sect. Horkelia (12 members)
- Horkelia sect. Parryae (2 members)
- Horkelia sect. Tridentatae (8 members)
- Horkelia tridentata (2 members)
- Horkeliella (2 members)
- Hornungia (1 member)
- Horsfordia (2 members)
- Hosta (3 members)
- Hottonia (1 member)
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- Howelliella (1 member)
- Hudsonia (3 members)
- Hulsea (8 members)
- Hulsea vestita (6 members)
- Hulteniella (1 member)
- Humulus (3 members)
- Humulus lupulus (4 members)
- Huperzia (7 members)
- Hura (1 member)
- Hyacinthoides (2 members)
- Hybanthus (5 members)
- Hydrangea (5 members)
- Hydrangeaceae (18 members)
- Hydrastis (1 member)
- Hydrilla (1 member)
- Hydrocharis (1 member)
- Hydrocharitaceae (20 members)
- Hydrocleys (1 member)
- Hygroamblystegium (2 members)
- Hygroamblystegium varium (4 members)
- Hygrohypnum (16 members)
- Hygroryza (1 member)
- Hylocereus (1 member)
- Hylocomiaceae (14 members)
- Hylocomiastrum (2 members)
- Hylocomium (1 member)
- Hylotelephium (3 members)
- Hymenachne (1 member)
- Hymenocallis (17 members)
- Hymenocallis henryae (2 members)
- Hymenocallis occidentalis (2 members)
- Hymenopappus (14 members)
- Hymenopappus artemisiifolius (2 members)
- Hymenopappus filifolius (13 members)
- Hymenopappus flavescens (2 members)
- Hymenopappus scabiosaeus (2 members)
- Hymenophyllaceae (4 members)
- Hymenophyllum (3 members)
- Hymenostylium (2 members)
- Hymenostylium recurvirostrum (2 members)
- Hymenothrix (3 members)
- Hymenoxys (19 members)
- Hymenoxys ambigens (3 members)
- Hymenoxys richardsonii (2 members)
- Hyophila (1 member)
- Hyophiladelphus (1 member)
- Hyparrhenia (2 members)
- Hypericaceae (4 members)
- Hypericum (11 members)
- Hypericum ascyron (1 member)
- Hypericum hypericoides (2 members)
- Hypericum maculatum (1 member)
- Hypericum mutilum (2 members)
- Hypericum nitidum (2 members)
- Hypericum perforatum (1 member)
- Hypericum sect. Brathys (17 members)
- Hypericum sect. Hypericum (10 members)
- Hypericum sect. Myriandra (29 members)
- Hypericum sect. Roscyna (2 members)
- Hypericum sect. Webbia (1 member)
- Hypnaceae (38 members)
- Hypnum (24 members)
- Hypnum cupressiforme (4 members)
- Hypnum revolutum (2 members)
- Hypochaeris (5 members)
- Hypochaeris microcephala (1 member)
- Hypolepis (1 member)
- Hypopterygiaceae (2 members)
- Hypopterygium (2 members)
- Hypoxis (7 members)
- Iberis (3 members)
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- Idahoa (1 member)
- Iliamna (8 members)
- Illiciaceae (2 members)
- Illicium (2 members)
- Imbribryum (6 members)
- Imperata (3 members)
- Imported vocabulary (7 members)
- Indusiella (1 member)
- Inula (3 members)
- Iodanthus (1 member)
- Ionactis (5 members)
- Ionopsis (1 member)
- Iresine (5 members)
- Iridaceae (32 members)
- Iris (4 members)
- Iris (sect. Limniris) ser. Californicae (11 members)
- Iris (sect. Limniris) ser. Hexagonae (5 members)
- Iris (sect. Limniris) ser. Laevigatae (3 members)
- Iris (sect. Limniris) ser. Longipetalae (2 members)
- Iris (sect. Limniris) ser. Prisimaticae (1 member)
- Iris (sect. Limniris) ser. Sibirica (1 member)
- Iris (sect. Limniris) ser. Spuriae (1 member)
- Iris (sect. Limniris) ser. Tripetalae (3 members)
- Iris (sect. Limniris) ser. Vernae (2 members)
- Iris sect. Limniris (18 members)
- Iris sect. Lophiris (3 members)
- Iris subg. Iris (3 members)
- Iris subg. Limniris (4 members)
- Iris verna (2 members)
- Isatis (1 member)
- Ischaemum (2 members)
- Ismelia (1 member)
- Isocarpha (2 members)
- Isocarpha oppositifolia (1 member)
- Isocoma (12 members)
- Isocoma acradenia (3 members)
- Isocoma menziesii (5 members)
- Isolepis (4 members)
- Isopterygiopsis (3 members)
- Isopterygium (2 members)
- Isothecium (5 members)
- Isotria (2 members)
- Isoëtaceae (2 members)
- Isoëtes (24 members)
- Itea (1 member)
- Iteaceae (2 members)
- Iva (7 members)
- Ivesia (10 members)
- Ivesia aperta (2 members)
- Ivesia argyrocoma (1 member)
- Ivesia arizonica (2 members)
- Ivesia baileyi (2 members)
- Ivesia gordonii (4 members)
- Ivesia kingii (2 members)
- Ivesia lycopodioides (3 members)
- Ivesia rhypara (2 members)
- Ivesia sect. Comarella (2 members)
- Ivesia sect. Ivesia (10 members)
- Ivesia sect. Setosae (15 members)
- Ivesia sect. Stellariopsis (1 member)
- Ivesia sect. Unguiculatae (11 members)
- Ivesia shockleyi (2 members)
- Iwatsukiella (1 member)
- Ixeris (1 member)
- Ixophorus (1 member)
- Jacquinia (2 members)
- Jaegerina (1 member)
- Jaffueliobryum (2 members)
- Jamesia (3 members)
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- Jamesianthus (1 member)
- Jarava (3 members)
- Jatropha (11 members)
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- Jaumea (1 member)
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- Jensia (2 members)
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- Johanneshowellia (2 members)
- Jovibarba (1 member)
- Juglandaceae (4 members)
- Juglans (7 members)
- Juglans major (1 member)
- Juncaceae (4 members)
- Juncaginaceae (4 members)
- Juncus (14 members)
- Juncus acutus (1 member)
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- Juncus falcatus (2 members)
- Juncus hemiendytus (2 members)
- Juncus stygius (1 member)
- Juncus subg. Alpini (6 members)
- Juncus subg. Ensifolii (7 members)
- Juncus subg. Genuini (12 members)
- Juncus subg. Graminifolii (23 members)
- Juncus subg. Juncus (5 members)
- Juncus subg. Poiophylli (18 members)
- Juncus subg. Septati (33 members)
- Juncus triglumis (2 members)
- Juncus validus (2 members)
- Juniperus (4 members)
- Juniperus communis (3 members)
- Juniperus deppeana (1 member)
- Juniperus flaccida (1 member)
- Juniperus occidentalis (2 members)
- Juniperus sect. Juniperus (2 members)
- Juniperus sect. Sabina (16 members)
- Juniperus virginiana (2 members)
- Kalanchoë (3 members)
- Kallstroemia (6 members)
- Kalmia (10 members)
- Kalmia angustifolia (2 members)
- Kalmia microphylla (2 members)
- Kalmiopsis (2 members)
- Karroochloa (1 member)
- Karwinskia (1 member)
- Keckiella (11 members)
- Keckiella antirrhinoides (2 members)
- Keckiella breviflora (2 members)
- Keckiella rothrockii (2 members)
- Keckiella ternata (2 members)
- Kelseya (1 member)
- Kerria (1 member)
- Kiaeria (4 members)
- Kickxia (2 members)
- Kindbergia (2 members)
- Koanophyllon (3 members)
- Kobresia (3 members)
- Kochia (4 members)
- Kochia scoparia (1 member)
- Kochia sect. Neokochia (2 members)
- Kochia sect. Semibassia (2 members)
- Koeberlinia (2 members)
- Koeberlinia spinosa (3 members)
- Koeberliniaceae (2 members)
- Koeleria (3 members)
- Koenigia (1 member)
- Kopsiopsis (2 members)
- Kosteletzkya (2 members)
- Krameria (4 members)
- Krameriaceae (2 members)
- Krapovickasia (1 member)
- Krascheninnikovia (1 member)
- Krigia (8 members)
- Krigia cespitosa (2 members)
- Krugiodendron (1 member)
- Kyhosia (1 member)
- Kyllinga (5 members)
- L w ratio (16 members)
- Lachnagrostis (1 member)
- Lachnanthes (1 member)
- Lachnocaulon (5 members)
- Lactuca (10 members)
- Lagascea (2 members)
- Lagascea decipiens (1 member)
- Lagenaria (2 members)
- Lagenaria siceraria (1 member)
- Lagerstroemia (1 member)
- Lagophylla (4 members)
- Lagotis (2 members)
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- Lagunaria (1 member)
- Laguncularia (1 member)
- Lagurus (1 member)
- Lamarckia (1 member)
- Laportea (2 members)
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- Lapsanastrum (1 member)
- Lardizabalaceae (2 members)
- Larix (3 members)
- Larrea (1 member)
- Lasiacis (2 members)
- Lasianthaea (1 member)
- Lastarriaea (1 member)
- Lasthenia (14 members)
- Lasthenia californica (3 members)
- Lasthenia glabrata (2 members)
- Lasthenia sect. Amphiachaenia (5 members)
- Lasthenia sect. Burrielia (2 members)
- Lasthenia sect. Hologymne (4 members)
- Lasthenia sect. Lasthenia (1 member)
- Lasthenia sect. Ornduffia (3 members)
- Lasthenia sect. Platycarpha (1 member)
- Lasthenia sect. Ptilomeris (3 members)
- Launaea (1 member)
- Lauraceae (18 members)
- Lavatera (3 members)
- Layia (15 members)
- Layia pentachaeta (2 members)
- Laënnecia (6 members)
- Leavenworthia (8 members)
- Lechea (20 members)
- Lechea intermedia (4 members)
- Lechea maritima (3 members)
- Lechea pulchella (3 members)
- Lechea torreyi (2 members)
- Leersia (5 members)
- Leibnitzia (1 member)
- Leitneria (1 member)
- Leitneriaceae (2 members)
- Lembophyllaceae (6 members)
- Lemna (9 members)
- Lemnaceae (8 members)
- Length (102 members)
- Lenophyllum (1 member)
- Leontodon (4 members)
- Leontodon saxatilis (2 members)
- Lepanthopsis (1 member)
- Lepidium (44 members)
- Lepidium lasiocarpum (2 members)
- Lepidium virginicum (2 members)
- Lepidospartum (3 members)
- Leptarrhena (1 member)
- Leptobryum (1 member)
- Leptochloa (12 members)
- Leptochloa fusca (3 members)
- Leptochloa panicea (2 members)
- Leptodictyum (2 members)
- Leptodon (1 member)
- Leptodontaceae (6 members)
- Leptodontium (3 members)
- Leptodontium viticulosoides (1 member)
- Leptohymenium (1 member)
- Leptopterigynandrum (1 member)
- Leptospermum (1 member)
- Leptostomopsis (2 members)
- Lepuropetalon (1 member)
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- Lescuraea (1 member)
- Leskea (4 members)
- Leskeaceae (18 members)
- Leskeella (1 member)
- Lessingia (15 members)
- Lessingia glandulifera (3 members)
- Lessingia micradenia (2 members)
- Lessingia pectinata (2 members)
- Leucanthemella (1 member)
- Leucanthemum (3 members)
- Leuciva (1 member)
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- Leucodontaceae (6 members)
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- Lewisia (19 members)
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- Leymus (21 members)
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- Liatris (44 members)
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- Liatris pauciflora (2 members)
- Liatris punctata (3 members)
- Liatris pycnostachya (2 members)
- Liatris scariosa (3 members)
- Liatris spicata (2 members)
- Liatris squarrosa (2 members)
- Libertia (1 member)
- Licania (1 member)
- Licaria (1 member)
- Life cycle (137 members)
- Ligularia (1 member)
- Lilaea (1 member)
- Liliaceae (140 members)
- Lilium (25 members)
- Lilium humboldtii (2 members)
- Lilium pardalinum (5 members)
- Lilium washingtonianum (2 members)
- Limbella (1 member)
- Limnanthaceae (4 members)
- Limnanthes (4 members)
- Limnanthes alba (4 members)
- Limnanthes douglasii (5 members)
- Limnanthes floccosa (5 members)
- Limnanthes sect. Inflexae (5 members)
- Limnanthes sect. Limnanthes (5 members)
- Limnobium (1 member)
- Limnocharitaceae (2 members)
- Limnodea (1 member)
- Limnophila (2 members)
- Limonium (8 members)
- Limosella (2 members)
- Linaceae (8 members)
- Linaria (12 members)
- Linaria dalmatica (2 members)
- Linaria genistifolia (1 member)
- Lindbergia (2 members)
- Lindera (3 members)
- Lindernia (6 members)
- Linderniaceae (6 members)
- Lindheimera (1 member)
- Linum (6 members)
- Linum australe (2 members)
- Linum berlandieri (2 members)
- Linum carteri (2 members)
- Linum floridanum (2 members)
- Linum lewisii (3 members)
- Linum medium (2 members)
- Linum rigidum (2 members)
- Linum sect. Cathartolinum (1 member)
- Linum sect. Linopsis (36 members)
- Linum sect. Linum (7 members)
- Liparis (3 members)
- Lipocarpha (6 members)
- Liquidambar (1 member)
- Liriodendron (1 member)
- Listera (9 members)
- Listera cordata (2 members)
- Lithachne (1 member)
- Lithocarpus (2 members)
- Lithocarpus densiflorus (2 members)
- Lithophragma (10 members)
- Litsea (1 member)
- Littorella (1 member)
- Livistona (2 members)
- Lloydia (2 members)
- Lloydia serotina (2 members)
- Loasaceae (8 members)
- Lobularia (1 member)
- Loeflingia (1 member)
- Loeskeobryum (1 member)
- Loeskypnum (2 members)
- Logfia (6 members)
- Lolium (6 members)
- Lolium temulentum (2 members)
- Lomariopsis (1 member)
- Lophiola (1 member)
- Lophophora (1 member)
- Lorandersonia (7 members)
- Lorentziella (1 member)
- Ludwigia (14 members)
- Ludwigia glandulosa (2 members)
- Ludwigia peploides (3 members)
- Ludwigia sect. Isnardia (19 members)
- Ludwigia sect. Jussiaea (4 members)
- Ludwigia sect. Ludwigia (4 members)
- Ludwigia sect. Macrocarpon (2 members)
- Ludwigia sect. Myrtocarpus (1 member)
- Ludwigia sect. Pterocaulon (2 members)
- Ludwigia sect. Seminudae (1 member)
- Luetkea (1 member)
- Luffa (3 members)
- Luffa acutangula (1 member)
- Luina (2 members)
- Luisierella (1 member)
- Luma (1 member)
- Lumnitzera (1 member)
- Lunaria (1 member)
- Luziola (3 members)
- Luzula (6 members)
- Luzula acuminata (2 members)
- Luzula arcuata (1 member)
- Luzula luzuloides (1 member)
- Luzula multiflora (3 members)
- Luzula subg. Anthelaea (7 members)
- Luzula subg. Luzula (17 members)
- Luzula subg. Pterodes (3 members)
- Lycopodiaceae (14 members)
- Lycopodiella (6 members)
- Lycopodiophyta (3 members)
- Lycopodium (6 members)
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- Lygodesmia (6 members)
- Lygodesmia grandiflora (5 members)
- Lygodiaceae (2 members)
- Lygodium (3 members)
- Lyonia (6 members)
- Lyonia ligustrina (2 members)
- Lyonothamnus (1 member)
- Lyrocarpa (1 member)
- Lysichiton (1 member)
- Lysimachia (20 members)
- Lythraceae (20 members)
- Lythrum (13 members)
- Lythrum alatum (2 members)
- Mabrya (1 member)
- Machaeranthera (2 members)
- Macleaya (1 member)
- Maclura (1 member)
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- Macrocoma tenuis (1 member)
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- Madia (10 members)
- Magnolia (8 members)
- Magnoliaceae (4 members)
- Magnoliophyta (178 members)
- Maianthemum (6 members)
- Maianthemum racemosum (2 members)
- Malachra (2 members)
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- Malacothamnus (10 members)
- Malacothrix (20 members)
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- Malacothrix saxatilis (5 members)
- Malaxis (11 members)
- Malaxis monophyllos (2 members)
- Malephora (1 member)
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- Malpighia (1 member)
- Malpighiaceae (16 members)
- Malus (10 members)
- Malva (11 members)
- Malvaceae (12 members)
- Malvaceae subfam. Bombacoideae (2 members)
- Malvaceae subfam. Byttnerioideae (8 members)
- Malvaceae subfam. Grewioideae (4 members)
- Malvaceae subfam. Malvoideae (84 members)
- Malvaceae subfam. Sterculioideae (4 members)
- Malvaceae subfam. Tilioideae (2 members)
- Malvastrum (6 members)
- Malvaviscus (2 members)
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- Malvella (3 members)
- Mammea (1 member)
- Mammillaria (17 members)
- Mammillaria heyderi (2 members)
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- Manfreda (5 members)
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- Matteuccia struthiopteris (1 member)
- Matthiola (2 members)
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- Maxillaria (2 members)
- Maxonia (2 members)
- Maxonia apiifolia (1 member)
- Mayaca (1 member)
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- Mazus (2 members)
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- Meconella (3 members)
- Medeola (1 member)
- Meesia (3 members)
- Meesiaceae (8 members)
- Megathyrsus (1 member)
- Meiotrichum (1 member)
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- Melastoma (1 member)
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- Melica (22 members)
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- Melochia pyramidata (1 member)
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- Melothria (1 member)
- Menispermaceae (8 members)
- Menispermum (1 member)
- Mentzelia (10 members)
- Mentzelia humilis (2 members)
- Mentzelia laevicaulis (2 members)
- Mentzelia longiloba (3 members)
- Mentzelia sect. Bartonia (54 members)
- Mentzelia sect. Bicuspidaria (5 members)
- Mentzelia sect. Mentzelia (7 members)
- Mentzelia sect. Micromentzelia (2 members)
- Mentzelia sect. Trachyphytum (21 members)
- Mentzelia torreyi (2 members)
- Menziesia (2 members)
- Mercurialis (1 member)
- Mesadenus (1 member)
- Mesembryanthemum (2 members)
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- Micranthes (46 members)
- Micranthes nelsoniana (5 members)
- Microbryum (6 members)
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- Microbryum starckeanum (3 members)
- Microchloa (1 member)
- Microgramma (1 member)
- Micromitrium (4 members)
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- Microseris (13 members)
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- Microseris laciniata (4 members)
- Microstachys (1 member)
- Microstegium (1 member)
- Microthlaspi (1 member)
- Mielichhoferia (3 members)
- Mielichhoferiaceae (6 members)
- Mikania (3 members)
- Milium (2 members)
- Milla (1 member)
- Mimetanthe (1 member)
- Mimulus (3 members)
- Mimulus ringens (2 members)
- Mimusops (1 member)
- Minuartia (34 members)
- Minuartia nuttallii (4 members)
- Mirabilis (10 members)
- Mirabilis jalapa (1 member)
- Mirabilis laevis (3 members)
- Mirabilis linearis (3 members)
- Mirabilis multiflora (3 members)
- Mirabilis sect. Mirabilis (3 members)
- Mirabilis sect. Mirabilopsis (1 member)
- Mirabilis sect. Oxybaphoides (4 members)
- Mirabilis sect. Oxybaphus (11 members)
- Mirabilis sect. Quamoclidion (6 members)
- Miscanthus (5 members)
- Misopates (2 members)
- Misopates orontium (1 member)
- Mitella (9 members)
- Mniaceae (16 members)
- Mnium (9 members)
- Modiola (1 member)
- Moehringia (3 members)
- Moenchia (2 members)
- Moenchia erecta (1 member)
- Mohavea (2 members)
- Molendoa (3 members)
- Molinia (1 member)
- Molluginaceae (4 members)
- Mollugo (2 members)
- Momordica (3 members)
- Momordica charantia (1 member)
- Monanthochloë (1 member)
- Moneses (1 member)
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- Monolopia (5 members)
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- Monotropsis (1 member)
- Montia (8 members)
- Moorochloa (1 member)
- Moraceae (14 members)
- Moringa (1 member)
- Moringaceae (2 members)
- Mortonia (4 members)
- Morus (3 members)
- Mosiera (1 member)
- Mucronea (2 members)
- Muehlenbeckia (3 members)
- Muehlenbeckia hastulata (1 member)
- Muhlenbergia (70 members)
- Muilla (3 members)
- Mulgedium (1 member)
- Munroa (1 member)
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- Muntingiaceae (2 members)
- Munzothamnus (1 member)
- Murdannia (3 members)
- Musa (2 members)
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- Myagrum (1 member)
- Mycelis (1 member)
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- Myosoton (1 member)
- Myosurus (6 members)
- Myosurus apetalus (2 members)
- Myrcianthes (1 member)
- Myrica (7 members)
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- Myriophyllum (14 members)
- Myrsinaceae (10 members)
- Myrsine (1 member)
- Myrtaceae (26 members)
- Myrtus (1 member)
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- Nandina (1 member)
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- Neckeraceae (16 members)
- Neckeropsis (2 members)
- Nectandra (1 member)
- Neillia (1 member)
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- Nemastylis (5 members)
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- Neogaerrhinum (2 members)
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- Neolloydia conoidea (1 member)
- Neomacounia (1 member)
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- Neslia (1 member)
- Nestotus (2 members)
- Nestronia (1 member)
- Neurodium (1 member)
- Nevada (1 member)
- Neviusia (2 members)
- Neyraudia (1 member)
- Nicolletia (2 members)
- Nigella (1 member)
- Niphotrichum (4 members)
- Niphotrichum canescens (2 members)
- Niphotrichum sect. Elongata (4 members)
- Niphotrichum sect. Niphotrichum (3 members)
- Nipponanthemum (1 member)
- Nitrophila (2 members)
- Noccaea (4 members)
- Noccaea fendleri (5 members)
- Nogopterium (1 member)
- Nolina (14 members)
- Nopalea (1 member)
- Nothocalaïs (4 members)
- Nothochelone (1 member)
- Notholaena (12 members)
- Notholaena californica (2 members)
- Notholaena grayi (2 members)
- Nothoscordum (2 members)
- Nuphar (8 members)
- Nuttallanthus (3 members)
- Nyctaginaceae (26 members)
- Nyctaginia (1 member)
- Nymphaea (10 members)
- Nymphaea odorata (2 members)
- Nymphaeaceae (4 members)
- Nyssa (5 members)
- Nyssaceae (2 members)
- Oclemena (4 members)
- Octoblepharum (1 member)
- Odontites (1 member)
- Odontosoria (1 member)
- Odontostomum (1 member)
- Oeceoclades (1 member)
- Oedipodiaceae (2 members)
- Oedipodium (1 member)
- Oemleria (1 member)
- Oenothera (31 members)
- Oenothera (sect. Oenothera) ser. Allochroa (2 members)
- Oenothera avita (3 members)
- Oenothera californica (0 members)
- Oenothera capillifolia (2 members)
- Oenothera cespitosa (5 members)
- Oenothera cinerea (2 members)
- Oenothera deltoides (5 members)
- Oenothera drummondii (1 member)
- Oenothera elata (2 members)
- Oenothera fruticosa (2 members)
- Oenothera hartwegii (5 members)
- Oenothera heterophylla (2 members)
- Oenothera macrocarpa (4 members)
- Oenothera pallida (4 members)
- Oenothera sect. Anogra (10 members)
- Oenothera sect. Calylophus (4 members)
- Oenothera sect. Contortae (1 member)
- Oenothera sect. Eremia (1 member)
- Oenothera sect. Gaura (15 members)
- Oenothera sect. Gauropsis (1 member)
- Oenothera sect. Hartmannia (4 members)
- Oenothera sect. Kleinia (2 members)
- Oenothera sect. Kneiffia (7 members)
- Oenothera sect. Lavauxia (2 members)
- Oenothera sect. Leucocoryne (2 members)
- Oenothera sect. Megapterium (5 members)
- Oenothera sect. Oenothera (12 members)
- Oenothera sect. Pachylophus (5 members)
- Oenothera sect. Paradoxus (1 member)
- Oenothera sect. Peniophyllum (1 member)
- Oenothera stricta (1 member)
- Oenothera subsect. Calylophus (4 members)
- Oenothera subsect. Campogaura (2 members)
- Oenothera subsect. Candela (6 members)
- Oenothera subsect. Emersonia (1 member)
- Oenothera subsect. Gaura (12 members)
- Oenothera subsect. Lavauxia (3 members)
- Oenothera subsect. Munzia (2 members)
- Oenothera subsect. Nutantigemma (1 member)
- Oenothera subsect. Oenothera (14 members)
- Oenothera subsect. Raimannia (7 members)
- Oenothera subsect. Salpingia (6 members)
- Oenothera subsect. Schizocarya (1 member)
- Oenothera subsect. Stenosiphon (1 member)
- Oenothera subsect. Stipogaura (6 members)
- Oenothera subsect. Xenogaura (1 member)
- Oenothera subsect. Xerogaura (1 member)
- Oenothera tubicula (1 member)
- Oenothera villosa (2 members)
- Okenia (1 member)
- Oligomeris (1 member)
- Oligotrichum (4 members)
- Olsynium (2 members)
- Olsynium douglasii (2 members)
- Omalotheca (3 members)
- Onagraceae (4 members)
- Onagraceae subfam. Ludwigioideae (2 members)
- Onagraceae subfam. Onagroideae (6 members)
- Onagraceae tribe Circaeeae (4 members)
- Onagraceae tribe Epilobieae (4 members)
- Onagraceae tribe Onagreae (24 members)
- Oncidium (1 member)
- Oncophorus (3 members)
- Oncosiphon (1 member)
- Onoclea (1 member)
- Onopordum (4 members)
- Onopordum acanthium (1 member)
- Ophioglossaceae (6 members)
- Ophioglossum (7 members)
- Opizia (1 member)
- Oplismenus (1 member)
- Opuntia (38 members)
- Opuntia basilaris (4 members)
- Opuntia engelmannii (5 members)
- Opuntia humifusa (2 members)
- Opuntia polyacantha (5 members)
- Orchidaceae (8 members)
- Orchidaceae (tribe Arethuseae) subtribe Arethusinae (2 members)
- Orchidaceae (tribe Arethuseae) subtribe Bletiinae (6 members)
- Orchidaceae (tribe Cranichideae) subtribe Cranichidinae (4 members)
- Orchidaceae (tribe Cranichideae) subtribe Goodyerinae (6 members)
- Orchidaceae (tribe Cranichideae) subtribe Prescottiinae (2 members)
- Orchidaceae (tribe Cranichideae) subtribe Spiranthinae (22 members)
- Orchidaceae (tribe Cymbidieae) subtribe Corallorhizinae (4 members)
- Orchidaceae (tribe Cymbidieae) subtribe Cyrtopodiinae (4 members)
- Orchidaceae (tribe Cymbidieae) subtribe Eulophiinae (6 members)
- Orchidaceae (tribe Cymbidieae) subtribe Goveniinae (2 members)
- Orchidaceae (tribe Epidendreae) subtribe Laeliinae (8 members)
- Orchidaceae (tribe Epidendreae) subtribe Pleurothallidinae (4 members)
- Orchidaceae (tribe Epidendreae) subtribe Polystachynae (2 members)
- Orchidaceae (tribe Maxillarieae) subtribe Maxillariinae (2 members)
- Orchidaceae (tribe Maxillarieae) subtribe Oncidiinae (12 members)
- Orchidaceae (tribe Neottieae) subtribe Limodorinae (6 members)
- Orchidaceae (tribe Orchideae) subtribe Habenariinae (2 members)
- Orchidaceae (tribe Orchideae) subtribe Orchidinae (14 members)
- Orchidaceae (tribe Vanilleae) subtribe Pogoniinae (6 members)
- Orchidaceae (tribe Vanilleae) subtribe Vanillinae (2 members)
- Orchidaceae subfam. Cypripedioideae (2 members)
- Orchidaceae subfam. Epidendroideae (22 members)
- Orchidaceae subfam. Orchidoideae (4 members)
- Orchidaceae subfam. Vanilloideae (2 members)
- Orchidaceae tribe Arethuseae (4 members)
- Orchidaceae tribe Calypsoeae (4 members)
- Orchidaceae tribe Cranichideae (8 members)
- Orchidaceae tribe Cymbidieae (8 members)
- Orchidaceae tribe Dendrobieae (2 members)
- Orchidaceae tribe Epidendreae (6 members)
- Orchidaceae tribe Malaxideae (4 members)
- Orchidaceae tribe Maxillarieae (4 members)
- Orchidaceae tribe Neottieae (2 members)
- Orchidaceae tribe Orchideae (4 members)
- Orchidaceae tribe Triphoreae (2 members)
- Orchidaceae tribe Tropidieae (2 members)
- Orchidaceae tribe Vandeae (6 members)
- Orchidaceae tribe Vanilleae (4 members)
- Orcuttia (5 members)
- Oreas (1 member)
- Oreochrysum (1 member)
- Oreostemma (4 members)
- Oreostemma alpigenum (3 members)
- Ornithogalum (2 members)
- Ornithostaphylos (1 member)
- Orobanchaceae (54 members)
- Orobanche (23 members)
- Orobanche californica (6 members)
- Orobanche cooperi (3 members)
- Orobanche corymbosa (2 members)
- Orobanche parishii (2 members)
- Orobanche uniflora (2 members)
- Orobanche valida (2 members)
- Orochaenactis (1 member)
- Orontium (1 member)
- Orthilia (1 member)
- Orthocarpus (11 members)
- Orthocarpus cuspidatus (3 members)
- Orthocarpus tolmiei (2 members)
- Orthodontiaceae (2 members)
- Orthodontium (2 members)
- Orthothecium (6 members)
- Orthothecium chryseum (2 members)
- Orthotrichaceae (18 members)
- Orthotrichum (48 members)
- Orthotrichum pallens (3 members)
- Orychophragmus (1 member)
- Oryza (4 members)
- Oryzopsis (1 member)
- Osmadenia (1 member)
- Osmunda (5 members)
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- Osmundaceae (2 members)
- Osteospermum (2 members)
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- Ottelia (1 member)
- Oxalidaceae (2 members)
- Oxalis (38 members)
- Oxalis frutescens (1 member)
- Oxalis hirta (1 member)
- Oxycaryum (1 member)
- Oxydendrum (1 member)
- Oxyria (1 member)
- Oxyrrhynchium (1 member)
- Oxystylis (1 member)
- Oxytenia (1 member)
- Oxytheca (4 members)
- Oxytheca dendroidea (1 member)
- Oönopsis (5 members)
- Oönopsis foliosa (2 members)
- Pachycereus (1 member)
- Pachysandra (2 members)
- Packera (60 members)
- Packera bolanderi (2 members)
- Packera dimorphophylla (3 members)
- Packera eurycephala (2 members)
- Packera neomexicana (3 members)
- Packera pseudaurea (3 members)
- Packera subnuda (2 members)
- Paeonia (2 members)
- Paeoniaceae (2 members)
- Pages using duplicate arguments in template calls (9 members)
- Pages with broken file links (112 members)
- Palafoxia (10 members)
- Palamocladium (1 member)
- Palhinhaea (1 member)
- Paliurus (1 member)
- Paludella (1 member)
- Palustriella (1 member)
- Panicum (6 members)
- Panicum amarum (2 members)
- Panicum anceps (2 members)
- Panicum capillare (2 members)
- Panicum dichotomiflorum (3 members)
- Panicum hallii (2 members)
- Panicum hirticaule (3 members)
- Panicum miliaceum (2 members)
- Panicum philadelphicum (3 members)
- Panicum rigidulum (5 members)
- Panicum sect. Agrostoidea (4 members)
- Panicum sect. Antidotalia (1 member)
- Panicum sect. Bulbosa (2 members)
- Panicum sect. Dichotomiflora (4 members)
- Panicum sect. Hemitonia (1 member)
- Panicum sect. Monticola (2 members)
- Panicum sect. Obtusa (1 member)
- Panicum sect. Panicum (18 members)
- Panicum sect. Phanopyrum (1 member)
- Panicum sect. Repentia (5 members)
- Panicum sect. Tenera (1 member)
- Panicum sect. Urvilleana (1 member)
- Panicum sect. Verrucosa (2 members)
- Panicum subg. Agrostoidea (10 members)
- Panicum subg. Panicum (8 members)
- Panicum subg. Phanopyrum (8 members)
- Papaver (13 members)
- Papaver macounii (2 members)
- Papaver nudicaule (1 member)
- Papaver radicatum (4 members)
- Papaver sect. Argemonidium (1 member)
- Papaver sect. Californicum (1 member)
- Papaver sect. Macrantha (1 member)
- Papaver sect. Meconella (12 members)
- Papaver sect. Papaver (1 member)
- Papaver sect. Rhoeadium (2 members)
- Papaveraceae (34 members)
- Papillaria (1 member)
- Pappophorum (2 members)
- Paraleucobryum (2 members)
- Parapholis (2 members)
- Parasenecio (1 member)
- Parietaria (6 members)
- Parietaria hespera (2 members)
- Parkeriaceae (2 members)
- Parnassia (10 members)
- Parnassia cirrata (2 members)
- Paronychia (29 members)
- Paronychia chartacea (2 members)
- Paronychia echinulata (1 member)
- Paronychia fastigiata (3 members)
- Parrya (4 members)
- Parthenice (1 member)
- Parthenium (7 members)
- Parthenocissus (4 members)
- Pascalia (1 member)
- Pascopyrum (1 member)
- Paspalidium (1 member)
- Paspalum (44 members)
- Paspalum setaceum (9 members)
- Passiflora (19 members)
- Passiflora foetida (1 member)
- Passifloraceae (2 members)
- Paulownia (1 member)
- Paulowniaceae (2 members)
- Pavonia (4 members)
- Paxistima (2 members)
- Paysonia (9 members)
- Paysonia lasiocarpa (2 members)
- Pecluma (4 members)
- Pecluma ptilodon (1 member)
- Pectis (17 members)
- Pectis angustifolia (3 members)
- Pectis filipes (1 member)
- Pectis linifolia (1 member)
- Pectis papposa (2 members)
- Pedaliaceae (4 members)
- Pedicularis (48 members)
- Pedicularis attollens (2 members)
- Pedicularis bracteosa (8 members)
- Pedicularis centranthera (2 members)
- Pedicularis contorta (3 members)
- Pedicularis lanata (1 member)
- Pedicularis langsdorffii (2 members)
- Pedicularis palustris (1 member)
- Pedicularis parryi (3 members)
- Pedicularis racemosa (2 members)
- Pedicularis semibarbata (2 members)
- Pedicularis sudetica (5 members)
- Pediocactus (10 members)
- Pediocactus peeblesianus (2 members)
- Pelexia (1 member)
- Pellaea (18 members)
- Pellaea glabella (4 members)
- Pellaea mucronata (2 members)
- Pellaea ternifolia (3 members)
- Peltandra (2 members)
- Peniocereus (3 members)
- Peniocereus greggii (2 members)
- Pennellia (3 members)
- Pennisetum (18 members)
- Penstemon (4 members)
- Penstemon acuminatus (2 members)
- Penstemon ambiguus (2 members)
- Penstemon angustifolius (5 members)
- Penstemon attenuatus (4 members)
- Penstemon azureus (2 members)
- Penstemon barbatus (3 members)
- Penstemon caespitosus (3 members)
- Penstemon cardinalis (2 members)
- Penstemon clevelandii (3 members)
- Penstemon cobaea (2 members)
- Penstemon crandallii (5 members)
- Penstemon cyananthus (3 members)
- Penstemon davidsonii (3 members)
- Penstemon deustus (4 members)
- Penstemon eatonii (3 members)
- Penstemon eriantherus (5 members)
- Penstemon floridus (2 members)
- Penstemon fremontii (2 members)
- Penstemon fruticiformis (2 members)
- Penstemon fruticosus (3 members)
- Penstemon gairdneri (2 members)
- Penstemon glaber (3 members)
- Penstemon glandulosus (2 members)
- Penstemon heterodoxus (3 members)
- Penstemon heterophyllus (3 members)
- Penstemon humilis (3 members)
- Penstemon laetus (3 members)
- Penstemon laricifolius (2 members)
- Penstemon leiophyllus (3 members)
- Penstemon lentus (2 members)
- Penstemon leonardii (3 members)
- Penstemon linarioides (4 members)
- Penstemon montanus (2 members)
- Penstemon newberryi (3 members)
- Penstemon nitidus (2 members)
- Penstemon pachyphyllus (2 members)
- Penstemon palmeri (3 members)
- Penstemon procerus (6 members)
- Penstemon pseudospectabilis (2 members)
- Penstemon rattanii (2 members)
- Penstemon richardsonii (3 members)
- Penstemon rydbergii (3 members)
- Penstemon scariosus (4 members)
- Penstemon sect. Ambigui (3 members)
- Penstemon sect. Baccharifolii (1 member)
- Penstemon sect. Bridgesiani (1 member)
- Penstemon sect. Caespitosi (14 members)
- Penstemon sect. Chamaeleon (3 members)
- Penstemon sect. Coerulei (26 members)
- Penstemon sect. Cristati (35 members)
- Penstemon sect. Dissecti (1 member)
- Penstemon sect. Elmigera (7 members)
- Penstemon sect. Erianthera (14 members)
- Penstemon sect. Gentianoides (10 members)
- Penstemon sect. Glabri (49 members)
- Penstemon sect. Penstemon (70 members)
- Penstemon sect. Petiolati (1 member)
- Penstemon sect. Saccanthera (33 members)
- Penstemon sect. Spectabiles (18 members)
- Penstemon secundiflorus (2 members)
- Penstemon spectabilis (2 members)
- Penstemon subg. Dasanthera (2 members)
- Penstemon subg. Penstemon (30 members)
- Penstemon triflorus (2 members)
- Penstemon virgatus (2 members)
- Pentachaeta (7 members)
- Pentachaeta exilis (2 members)
- Pentagramma (3 members)
- Pentagramma triangularis (4 members)
- Penthoraceae (2 members)
- Penthorum (1 member)
- Pentzia (1 member)
- Peperomia (7 members)
- Peraphyllum (1 member)
- Pereskia (3 members)
- Pereskia grandifolia (1 member)
- Pericallis (1 member)
- Pericome (1 member)
- Peritoma (7 members)
- Peritoma arborea (3 members)
- Perityle (6 members)
- Perityle bisetosa (3 members)
- Perityle gilensis (2 members)
- Perityle lindheimeri (2 members)
- Perityle megalocephala (2 members)
- Perityle microglossa (1 member)
- Perityle rupestris (2 members)
- Perityle sect. Laphamia (28 members)
- Perityle sect. Pappothrix (7 members)
- Perityle sect. Perityle (7 members)
- Perityle staurophylla (2 members)
- Persea (3 members)
- Persicaria (10 members)
- Persicaria meisneriana (1 member)
- Persicaria sect. Cephalophilon (3 members)
- Persicaria sect. Echinocaulon (6 members)
- Persicaria sect. Persicaria (16 members)
- Persicaria sect. Rubrivena (2 members)
- Persicaria sect. Tovara (1 member)
- Persicaria wallichii (1 member)
- Petalonyx (5 members)
- Petalonyx thurberi (2 members)
- Petasites (2 members)
- Petasites frigidus (4 members)
- Petiveria (1 member)
- Petradoria (2 members)
- Petradoria pumila (2 members)
- Petrophytum (4 members)
- Petrophytum caespitosum (2 members)
- Petrorhagia (5 members)
- Petrorhagia saxifraga (1 member)
- Peucephyllum (1 member)
- Phalacroseris (1 member)
- Phalaris (11 members)
- Phanerophlebia (2 members)
- Pharus (1 member)
- Phaulothamnus (1 member)
- Phedimus (3 members)
- Phegopteris (2 members)
- Phemeranthus (16 members)
- Phenology (238 members)
- Philadelphus (11 members)
- Philadelphus microphyllus (4 members)
- Philadelphus texensis (2 members)
- Philonotis (12 members)
- Philonotis fontana (3 members)
- Phippsia (2 members)
- Phlebodium (1 member)
- Phlegmariurus (1 member)
- Phleum (6 members)
- Phoebanthus (2 members)
- Phoenicaulis (1 member)
- Phoenix (2 members)
- Phoradendron (8 members)
- Phoradendron villosum (2 members)
- Photinia (5 members)
- Photinia davidiana (1 member)
- Phragmites (1 member)
- Phryma (2 members)
- Phryma leptostachya (1 member)
- Phrymaceae (12 members)
- Phyllanthaceae (14 members)
- Phyllanthopsis (2 members)
- Phyllanthus (20 members)
- Phyllanthus abnormis (2 members)
- Phyllanthus caroliniensis (2 members)
- Phyllanthus liebmannianus (1 member)
- Phyllanthus urinaria (1 member)
- Phyllodoce (5 members)
- Phyllospadix (3 members)
- Phyllostachys (2 members)
- Physaria (104 members)
- Physaria arenosa (2 members)
- Physaria argyraea (1 member)
- Physaria carinata (3 members)
- Physaria didymocarpa (3 members)
- Physaria douglasii (2 members)
- Physaria floribunda (2 members)
- Physaria geyeri (2 members)
- Physaria gracilis (2 members)
- Physaria hemiphysaria (2 members)
- Physaria hitchcockii (3 members)
- Physaria kingii (7 members)
- Physaria lepidota (2 members)
- Physaria newberryi (2 members)
- Physaria occidentalis (2 members)
- Physaria ovalifolia (2 members)
- Physaria saximontana (2 members)
- Physcomitrella (2 members)
- Physcomitrium (4 members)
- Physocarpus (6 members)
- Phytolacca (7 members)
- Phytolacca americana (2 members)
- Phytolaccaceae (12 members)
- Picea (9 members)
- Picea engelmannii (1 member)
- Picradeniopsis (2 members)
- Picramnia (1 member)
- Picramniaceae (4 members)
- Picris (2 members)
- Picrodendraceae (2 members)
- Picrothamnus (1 member)
- Pieris (2 members)
- Pilea (5 members)
- Pilosium (1 member)
- Pilosocereus (1 member)
- Pilostyles (1 member)
- Pilotrichaceae (6 members)
- Pilularia (1 member)
- Pinaceae (12 members)
- Pinaropappus (2 members)
- Pinus (44 members)
- Pinus contorta (3 members)
- Pinus elliottii (2 members)
- Pinus leiophylla (1 member)
- Pinus ponderosa (3 members)
- Pinus sylvestris (1 member)
- Pinus torreyana (2 members)
- Piper (2 members)
- Piperaceae (4 members)
- Piperia (11 members)
- Piperia elegans (2 members)
- Piptatherum (8 members)
- Piptatherum miliaceum (2 members)
- Piptochaetium (6 members)
- Pireella (2 members)
- Piriqueta (2 members)
- Piriqueta cistoides (1 member)
- Pisonia (3 members)
- Pistia (1 member)
- Pityopsis (9 members)
- Pityopsis aspera (2 members)
- Pityopsis graminifolia (5 members)
- Pityopus (1 member)
- Pityrogramma (3 members)
- Pityrogramma calomelanos (1 member)
- Plagiobryoides (5 members)
- Plagiobryum (2 members)
- Plagiomnium (11 members)
- Plagiopus (1 member)
- Plagiotheciaceae (2 members)
- Plagiothecium (6 members)
- Planera (1 member)
- Planodes (1 member)
- Plantaginaceae (90 members)
- Plantago (32 members)
- Platanaceae (2 members)
- Platanthera (36 members)
- Platanthera blephariglottis (2 members)
- Platanthera dilatata (3 members)
- Platanthera flava (2 members)
- Platanthera tipuloides (1 member)
- Platanus (3 members)
- Plateilema (1 member)
- Plates (225 members)
- Platydictya (4 members)
- Platygyrium (2 members)
- Platylomella (1 member)
- Platyschkuhria (1 member)
- Platystemon (1 member)
- Platythelys (1 member)
- Plaubelia (2 members)
- Plaubelia sprengelii (2 members)
- Plectocephalus (2 members)
- Pleea (1 member)
- Pleiacanthus (1 member)
- Pleopeltis (6 members)
- Pleopeltis polylepis (1 member)
- Pleopeltis polypodioides (1 member)
- Pleradenophora (1 member)
- Pleuricospora (1 member)
- Pleuridium (4 members)
- Pleurochaete (1 member)
- Pleurocoronis (1 member)
- Pleuropogon (6 members)
- Pleuropogon californicus (2 members)
- Pleurothallis (1 member)
- Pleuroziopsaceae (2 members)
- Pleuroziopsis (1 member)
- Pleurozium (1 member)
- Ploidy (1 member)
- Pluchea (10 members)
- Pluchea odorata (2 members)
- Plumbaginaceae (6 members)
- Plumbago (2 members)
- Poa (7 members)
- Poa abbreviata (3 members)
- Poa alpina (2 members)
- Poa arctica (5 members)
- Poa bulbosa (2 members)
- Poa cusickii (4 members)
- Poa fendleriana (3 members)
- Poa glauca (3 members)
- Poa hartzii (3 members)
- Poa laxa (2 members)
- Poa pratensis (6 members)
- Poa saltuensis (2 members)
- Poa sect. Abbreviatae (6 members)
- Poa sect. Alpinae (2 members)
- Poa sect. Arctopoa (1 member)
- Poa sect. Arenariae (2 members)
- Poa sect. Dioicopoa (1 member)
- Poa sect. Homalopoa (10 members)
- Poa sect. Madropoa (5 members)
- Poa sect. Micrantherae (3 members)
- Poa sect. Oreinos (4 members)
- Poa sect. Pandemos (1 member)
- Poa sect. Poa (6 members)
- Poa sect. Secundae (4 members)
- Poa sect. Stenopoa (5 members)
- Poa sect. Sylvestres (8 members)
- Poa sect. Tichopoa (1 member)
- Poa secunda (2 members)
- Poa stenantha (2 members)
- Poa subg. Arctopoa (2 members)
- Poa subg. Poa (29 members)
- Poa subsect. Epiles (7 members)
- Poa subsect. Halophytae (5 members)
- Poa subsect. Madropoa (8 members)
- Poa subsect. Poa (8 members)
- Poa subsect. Secundae (7 members)
- Poa unilateralis (2 members)
- Poaceae (20 members)
- Poaceae subfam. Aristidoideae (2 members)
- Poaceae subfam. Arundinoideae (2 members)
- Poaceae subfam. Bambusoideae (4 members)
- Poaceae subfam. Centothecoideae (4 members)
- Poaceae subfam. Chloridoideae (6 members)
- Poaceae subfam. Danthonioideae (2 members)
- Poaceae subfam. Ehrhartoideae (4 members)
- Poaceae subfam. Panicoideae (6 members)
- Poaceae subfam. Pharoideae (2 members)
- Poaceae subfam. Pooideae (18 members)
- Poaceae tribe Andropogoneae (60 members)
- Poaceae tribe Aristideae (2 members)
- Poaceae tribe Arundineae (8 members)
- Poaceae tribe Bambuseae (8 members)
- Poaceae tribe Brachyelytreae (2 members)
- Poaceae tribe Brachypodieae (2 members)
- Poaceae tribe Bromeae (2 members)
- Poaceae tribe Centotheceae (2 members)
- Poaceae tribe Cynodonteae (106 members)
- Poaceae tribe Danthonieae (12 members)
- Poaceae tribe Diarrheneae (2 members)
- Poaceae tribe Ehrharteae (2 members)
- Poaceae tribe Gynerieae (2 members)
- Poaceae tribe Meliceae (8 members)
- Poaceae tribe Nardeae (2 members)
- Poaceae tribe Olyreae (2 members)
- Poaceae tribe Orcuttieae (6 members)
- Poaceae tribe Oryzeae (12 members)
- Poaceae tribe Paniceae (55 members)
- Poaceae tribe Pappophoreae (6 members)
- Poaceae tribe Phareae (2 members)
- Poaceae tribe Poeae (134 members)
- Poaceae tribe Stipeae (30 members)
- Poaceae tribe Thysanolaeneae (2 members)
- Poaceae tribe Triticeae (39 members)
- Podagrostis (2 members)
- Podophyllum (1 member)
- Podostemaceae (2 members)
- Podostemum (1 member)
- Pogonarthria (1 member)
- Pogonatum (5 members)
- Pogonia (1 member)
- Pohlia (32 members)
- Polanisia (7 members)
- Polanisia dodecandra (3 members)
- Polanisia erosa (2 members)
- Polycarpaea (1 member)
- Polycarpon (3 members)
- Polycarpon tetraphyllum (1 member)
- Polycnemum (2 members)
- Polyctenium (1 member)