View source for Isoëtes flaccida

{{Treatment/ID
|accepted_name=Isoëtes flaccida
|accepted_authority=Shuttleworth ex 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-d0_s0" data-properties="whole_organism growth form or habitat;whole_organism location;whole_organism growth form"><b>Plants </b>aquatic, emergent.</span> <span class="statement" id="st-d0_s1" data-properties="rootstock shape;rootstock shape"><b>Rootstock </b>nearly globose, 2-3-lobed.</span> <span class="statement" id="st-d0_s2" data-properties="leaf duration;leaf coloration;leaf coloration;leaf arrangement;leaf fragility or texture;leaf shape"><b>Leaves </b>evergreen, bright green, pale toward base, spirally arranged to 60 cm, pliant, gradually tapering to tip.</span> <span class="statement" id="st-d0_s3" data-properties="sporangium architecture or shape"><b>Velum </b>covering entire sporangium.</span> <span class="statement" id="st-d0_s4" data-properties="sporangium wall coloration"><b>Sporangium </b>wall unpigmented.</span> <span class="statement" id="st-d0_s5" data-properties="megaspore coloration;megaspore diameter;megaspore relief"><b>Megaspores </b>white, 250–500 μm diam., tuberculate to rugulate;</span> <span class="statement" id="st-d0_s6" data-properties="girdle architecture or pubescence or relief">girdle smooth.</span> <span class="statement" id="st-d0_s7" data-properties=""><b>Microspores </b>light-brown in mass, 25-33 μm, papillose.</span> <span class="statement" id="st-d0_s8" data-properties="microspore coloration;microspore some measurement;microspore relief;2n chromosome quantity">2n = 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>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><!--
--><p>Isoëtes flaccida hybridizes with I. engelmannii</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Isoëtes flaccida
|authority=Shuttleworth ex 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://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V2/V2_190.xml
|genus=Isoëtes
|species=Isoëtes flaccida
|2n chromosome quantity=22
|girdle architecture or pubescence or relief=smooth
|leaf arrangement=arranged
|leaf coloration=pale;bright green
|leaf duration=evergreen
|leaf fragility or texture=pliant
|leaf shape=tapering
|megaspore coloration=white
|megaspore diameter=250um;500um
|megaspore relief=tuberculate;rugulate
|microspore coloration=light-brown
|microspore relief=papillose
|microspore some measurement=25um;33um
|rootstock shape=2-3-lobed;globose
|sporangium architecture or shape=entire
|sporangium wall coloration=unpigmented
|whole_organism growth form=plant
|whole_organism growth form or habitat=aquatic
|whole_organism location=emergent
}}<!--

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