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elliptic, sometimes oblanceolate, ovate, or obovate, 1.8–6 × 0.6–2.5 cm, l/w ratio 1.9–3.5, margins entire or finely to coarsely serrate, sometimes doubly

Endemic Treatment appears in FNA Volume 9. Treatment on page 444. Leaflets: l/w ratio 2.2–3.1, margins toothed apically, serrate for more than 1/2 their length

leaflets 11–17, opposite, lanceolate to oblong-lanceolate, 5–10 × 1–2.5 cm, l/w ratio 3.4–5, margins serrulate to serrate, at least in apical 1/2 and often almost

narrowly elliptic, elliptic, oblong, or oblanceolate, 2.5–6.5 × 0.9–2.5 cm, l/w ratio 1.9–3.8, margins serrate, apex usually acute to acuminate or attenuate

oblong to elliptic, sometimes narrowly elliptic, 2.5–4.1(–4.5) × 0.9–2 cm, l/w ratio 2.1–2.6, margins finely to coarsely serrate, sometimes doubly serrate,

grayi (Wenzig) Calder & Roy L. Taylor Treatment appears in FNA Volume 9. Treatment on page 444. Mentioned on page 445. Leaflets: l/w ratio 1.9–3.5, margins entire

narrowly ovate, oblanceolate, or obovate, (3–)4–6.5(–8.7) × 1.5–2.7 cm, l/w ratio 2.1–4.4, margins finely serrate, apex obtuse, acute, or acuminate, surfaces

(11–)13–17, opposite, elliptic, oblong to oblong-ovate, 4–7(–8) × 1.5–2.5 cm, l/w ratio 2.4–3.2(–3.6), margins serrate, sometimes serrulate, at least in distal

oblong to oblong-lanceolate or oblanceolate, (2.5–)3–6(–7.5) × 1.5–2 cm, l/w ratio 2.4–3.7, margins serrate at least in distal 1/2, often almost to base,

coloration Leaflet fragility Leaflet height or length or size Leaflet l w ratio Leaflet length Leaflet odor Leaflet pubescence Leaflet quantity Leaflet

discovered in Europe (G. Aas et al. 1994; M. F. Fay et al. 2002; T. C. G. Rich and L. Houston 2006; A. Robertson and C. Sydes 2006). Nonetheless, the argument has

some measurement Lateral lobe variability Lateral lobe width Leaf lobe l w ratio Leaf lobe length Leaf lobe quantity Lobe Lobe architecture Lobe architecture

fixation or orientation Stigma fusion Stigma height or length or size Stigma l w ratio Stigma length or size Stigma orientation Stigma placentation Stigma position

Flower growth form or location Flower height or length or size Flower l w ratio Flower length Flower length or size Flower life cycle Flower location Flower

Tubercle fusion Tubercle height Tubercle height or length or size Tubercle l w ratio Tubercle length Tubercle length or size Tubercle orientation Tubercle position

rotundifolia (Huth) C. L. Hitchcock Caltha howellii (de Candolle) W. Weber Caltha leptosepala var. rotundifolia Huth Caltha leptosepala var. sulfurea C. L. Hitchcock

Mass., Mich., Minn., N.H., N.J., N.Y., Ohio, Pa., R.I., Vt., W.Va., Wis., e Eurasia. M.L. Fernald (1929) treated plants from Greenland and eastern North

A Text property defining a single value. A l w ratio property A subproperty of inflorescence A Part of inflorescence None. None.

A Text property defining a single value. A l w ratio property A subproperty of pistil A Part of pistil None. None.

A Text property defining a single value. A l w ratio property A subproperty of leaf A Part of leaf None. None.

A Text property defining a single value. A l w ratio property A subproperty of leaf A Type of leaf None. None.

A Text property defining a single value. A l w ratio property A subproperty of stem A Type of stem None. None.

A Text property defining a single value. A l w ratio property A subproperty of corolla A Part of corolla None. None.

A Text property defining a single value. A l w ratio property A subproperty of corolla A Part of corolla None. None.

A Text property defining a single value. A l w ratio property A subproperty of leaf A Part of leaf None. None.

A Text property defining a single value. A l w ratio property None. None.

A Text property defining a single value. A l w ratio property A Top Level Property None. None.

A Text property defining a single value. A l w ratio property A subproperty of flower A Part of flower None. None.

A Text property defining a single value. A l w ratio property A subproperty of leaf A Part of leaf None. None.

A Text property defining a single value. A l w ratio property None. None.

A Text property defining a single value. A l w ratio property A Top Level Property None. None.

A Text property defining a single value. A l w ratio property A subproperty of leaf A Part of leaf None. None.

A Text property defining a single value. A l w ratio property A Top Level Property None. None.

Gray (W. R. Philipson and M. N. Philipson 1986). Here, Therorhodion is recognized as a genus distinct from Rhododendron (see K. A. Kron and W. S. Judd

glabrous; endosperm liquid, x = 7. Conn., N.J., N.Y., Wash., Del., D.C, Wis., W.Va., Pacific Islands (Hawaii), Mass., Maine, N.H., R.I., Vt., Fla., Wyo., Utah

Schnell Castanea 44: 218, figs. 1, 2. 1979 ,. T. Lawrence Mellichamp, Frederick W. Case Common names: Gulf Coast red pitcher plant EndemicConservation concern

cultivars exist for the most commonly cultivated Old World larches, L. decidua Miller and L. kaempferi (Lambert) Carrière, but almost none for the North American

speciesSphenopholis pensylvanica (L.) Hitchc. Thomas F. Daniel Common names: Swamp oats Endemic Synonyms: Trisetum pensylvanicum (L.) P. Beauv. Treatment appears

arcticum (R. S. Williams) Brotherus C. stellatum var. arcticum (R. S. Williams) L. I. Savicz Treatment appears in FNA Volume 28. Treatment on page 295. Mentioned

measurements here include petioles plus blades. Ratios of lengths to widths of phyllaries are expressed as “l/w = 2.5–5,” etc. Beaman, J. H. 1957. The systematics

identification requires mature fruits. In this treatment, the range of ratios of length to width (l/w) of individual fruits of a species is given as a means to relate

America. Bot. Tidsskr. 6l: 22–55. Stebbins, G. L. 1932. Cytology of Antennaria. I. Normal species. Bot. Gaz. 94: 134–151. Stebbins, G. L. 1932b. Cytology of

ae genusScleropodium speciesScleropodium cespitans (Müller Hal.) L. F. Koch Leafl. W. Bot. 6: 31. 1950. Michael S. Ignatov Basionym: Hypnum cespitans Müller

teeth per side to length in mm of terminal leaflet). The length to width ratio of leaflets is also given. Fragaria belongs to subtribe Fragariinae (D. Potter

Charles T. Bryson IllustratedEndemic Synonyms: Carex amphibola var. rigida (L. H. Bailey) Fernald Treatment appears in FNA Volume 23. Treatment on page 456

“Klass” Tetradynamia. More recently and based on a limited sampling of genera, W. S. Judd et al. (1994) recommended that the Brassicaceae and Capparaceae (including

distinguishing feature. The ratio of length of the sheath to the length of the limb provides the most consistent way to separate L. glaucum from L. albidum. Sporophytes

species W. condensa including large distal laminal cells, ca. 10–13 µm, and large mucro, of ca. 7–9 cells; W. sharpii has a reduced peristome, W. condensa

Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., Wyo., Mexico, West Indies, Central America, South America, Eurasia

Poa arida, Poa subg. Arctopoa, Poa subg. Poa, Poa ×gaspensis, Poa ×limosa L. Robert J. Soreng Treatment appears in FNA Volume 24. Treatment on page 486

Scoggan (1978–1979, part 4), and W. J. Cody (2000) treated them as subspecies; B. K. Schischkin (1952) and A. E. Porsild and W. J. Cody (1980) treated them

margins (B. McCallum 1902; G. P. Burns 1904; N. C. Fassett 1953c; W. B. L. Schmidt and W. F. Millington 1968). Intermediate leaf forms often occur, which

genusErigeron speciesErigeron hyssopifolius Michaux Fl. Bor.-Amer. 2: 123. 1803. Guy L. Nesom Common names: Hyssop-leaf fleabane vergerette à feuilles d’hysope IllustratedEndemic

Chapman 1976; W.A. Glooschenko 1980; B.L. Haines and E.L. Dunn 1985; R.J. Reimold 1977). This corresponds to the "northern cordgrass prairie" of A.W. Küchler

Robert F. C. Naczi IllustratedEndemic Synonyms: Carex deweyana var. sparsiflora L. H. Bailey Treatment appears in FNA Volume 23. Treatment on page 322. Mentioned

1983; W.A. Watts 1983; V.M. Bryant Jr. and R.G. Holloway 1985; R.B. Davis and G.L. Jacobson Jr. 1985; P.A. Delcourt and H.R. Delcourt 1987, 1987b; G.L. Jacobson

climate, and it has been described by several biogeographers (W.E. Akin 1991; P.W. Birkeland 1984; S.W. Buol et al. 1980; S.R. Eyre 1971; D.Steila and T.E. Pond

venation of ferns provides a rich source of information for identification (W.H. Wagner Jr. 1979). Vein patterns may best be seen by holding the blade up