Difference between revisions of "Isoëtes flaccida"
Flora 29: 178. 1846.
FNA>Volume Importer |
RevisionBot (talk | contribs) m (Bot: Adding category Revised Since Print) |
||
| (9 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
{{Treatment/ID | {{Treatment/ID | ||
|accepted_name=Isoëtes flaccida | |accepted_name=Isoëtes flaccida | ||
| − | |accepted_authority=A. Braun | + | |accepted_authority=Shuttleworth ex A. Braun |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=Flora | |title=Flora | ||
| Line 12: | Line 12: | ||
|name=Isoëtes chapmanii | |name=Isoëtes chapmanii | ||
|authority=(Engelmann) Small | |authority=(Engelmann) Small | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Isoëtaceae;Isoëtes;Isoëtes flaccida | |hierarchy=Isoëtaceae;Isoëtes;Isoëtes flaccida | ||
| Line 26: | Line 27: | ||
|habitat=Emergent or in shallow water of lakes, ponds, streams, ditches, and marshes | |habitat=Emergent or in shallow water of lakes, ponds, streams, ditches, and marshes | ||
|distribution=Fla.;Ga. | |distribution=Fla.;Ga. | ||
| − | |discussion=<p>Isoëtes flaccida includes individuals with a variety range of megaspore sizes and textures. Although megaspores are fairly uniform among individuals within a population, considerable variation occurs between populations. A local Florida population with megaspores that are nearly smooth on the proximal faces and low-tuberculate on the distal hemisphere has been described as I. flaccida var chapmanii Engelmann. Isoëtes flaccida var. alata (Small) N. E. Pfeiffer has included plants in which the megaspores are densely tuberculate to rugulate on the proximal faces and have bold, anastomosing ridges on the distal hemispheres.</p><!-- | + | |discussion=<p><i>Isoëtes flaccida</i> includes individuals with a variety range of megaspore sizes and textures. Although megaspores are fairly uniform among individuals within a population, considerable variation occurs between populations. A local Florida population with megaspores that are nearly smooth on the proximal faces and low-tuberculate on the distal hemisphere has been described as <i>I. flaccida</i> var chapmanii Engelmann. <i>Isoëtes flaccida</i> var. alata (Small) N. E. Pfeiffer has included plants in which the megaspores are densely tuberculate to rugulate on the proximal faces and have bold, anastomosing ridges on the distal hemispheres.</p><!-- |
| − | --><p>Isoëtes flaccida hybridizes with I. engelmannii</p> | + | --><p><i>Isoëtes flaccida</i> hybridizes with <i>I. engelmannii</i></p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 36: | Line 37: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Isoëtes flaccida | name=Isoëtes flaccida | ||
| − | + | |authority=Shuttleworth ex A. Braun | |
| − | |authority=A. Braun | ||
|rank=species | |rank=species | ||
|parent rank=genus | |parent rank=genus | ||
| Line 50: | Line 50: | ||
|publication year=1846 | |publication year=1846 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_190.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes flaccida | |species=Isoëtes flaccida | ||
}}<!-- | }}<!-- | ||
| − | -->[[Category:Treatment]][[Category:Isoëtes]] | + | --> |
| + | |||
| + | [[Category:Treatment]] | ||
| + | [[Category:Isoëtes]] | ||
| + | [[Category:Revised Since Print]] | ||
Latest revision as of 20:38, 6 November 2020
Plants aquatic, emergent. Rootstock nearly globose, 2-3-lobed. Leaves evergreen, bright green, pale toward base, spirally arranged to 60 cm, pliant, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores white, 250–500 μm diam., tuberculate to rugulate; girdle smooth. Microspores light brown in mass, 25-33 μm, papillose. 2n = 22.
Phenology: Spores mature in summer.
Habitat: Emergent or in shallow water of lakes, ponds, streams, ditches, and marshes
Discussion
Isoëtes flaccida includes individuals with a variety range of megaspore sizes and textures. Although megaspores are fairly uniform among individuals within a population, considerable variation occurs between populations. A local Florida population with megaspores that are nearly smooth on the proximal faces and low-tuberculate on the distal hemisphere has been described as I. flaccida var chapmanii Engelmann. Isoëtes flaccida var. alata (Small) N. E. Pfeiffer has included plants in which the megaspores are densely tuberculate to rugulate on the proximal faces and have bold, anastomosing ridges on the distal hemispheres.
Isoëtes flaccida hybridizes with I. engelmannii
Selected References
None.