View source for Isoëtes flaccida

{{Treatment/ID
|accepted_name=Isoëtes flaccida
|accepted_authority=A. Braun
|publications={{Treatment/Publication
|title=Flora
|place=29: 178. 1846
|year=1846
}}
|common_names=Florida quillwort
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Isoëtes chapmanii
|authority=(Engelmann) Small
|rank=species
}}
|hierarchy=Isoëtaceae;Isoëtes;Isoëtes flaccida
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Isoëtaceae]]</div><div class="higher-taxon"><small>genus</small>[[Isoëtes]]</div><div class="higher-taxon"><small>species</small>[[Isoëtes flaccida]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>aquatic, emergent. <b>Rootstock</b> nearly globose, 2-3-lobed. <b>Leaves</b> evergreen, bright green, pale toward base, spirally arranged to 60 cm, pliant, gradually tapering to tip. <b>Velum</b> covering entire sporangium. <b>Sporangium</b> wall unpigmented. <b>Megaspores</b> white, 250–500 μm diam., tuberculate to rugulate; girdle smooth. <b>Microspores</b> light brown in mass, 25-33 μm, papillose. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Spores mature in summer.
|habitat=Emergent or in shallow water of lakes, ponds, streams, ditches, and marshes
|distribution=Fla.;Ga.
|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><i>Isoëtes flaccida</i> hybridizes with <i>I. engelmannii</i></p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Isoëtes flaccida
|authority=A. Braun
|rank=species
|parent rank=genus
|synonyms=Isoëtes chapmanii
|basionyms=
|family=Isoëtaceae
|phenology=Spores mature in summer.
|habitat=Emergent or in shallow water of lakes, ponds, streams, ditches, and marshes
|distribution=Fla.;Ga.
|reference=None
|publication title=Flora
|publication year=1846
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_190.xml
|genus=Isoëtes
|species=Isoëtes flaccida
}}<!--

-->[[Category:Treatment]][[Category:Isoëtes]]