View source for Isoëtes echinospora

{{Treatment/ID
|accepted_name=Isoëtes echinospora
|accepted_authority=Durieu
|publications={{Treatment/Publication
|title=Bull. Soc. Bot. France
|place=8:164. 1861
|year=1861
}}
|common_names=Spiny-spored quillwort;isoète à spores épineuses
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Isoëtes braunii
|authority=Durieu
}} {{Treatment/ID/Synonym
|name=Isoëtes echinospospora subsp. muricata
|authority=(Durieu) A. Löve & D. Löve
}} {{Treatment/ID/Synonym
|name=Isoëtes echinospora var. boottii
|authority=Engelmann
}} {{Treatment/ID/Synonym
|name=Isoëtes echinospora var. braunii
|authority=(Durieu) Engelmann
}} {{Treatment/ID/Synonym
|name=Isoëtes echinospora var. muricata
|authority=(Durieu) Engelmann
}} {{Treatment/ID/Synonym
|name=Isoëtes muricata
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Isoëtes setacea subsp. muricata
|authority=(Durieu) Holub
}}
|hierarchy=Isoëtaceae;Isoëtes;Isoëtes echinospora
|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 echinospora]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>usually aquatic, occasionally emergent. <b>Rootstock</b> nearly globose, 2-lobed. <b>Leaves</b> ± deciduous, bright green to reddish green, pale toward base, spirally arranged, to 25(–40) cm, pliant, gradually tapering toward tip. <b>Velum</b> covering less than 1/2 of sporangium. <b>Sporangium</b> wall ± brown-streaked. <b>Megaspores</b> white, 400–550 μm diam., echinate with thin, sharp spines; girdle obscure. <b>Microspores</b> gray to light brown in mass, 20–30 μm, smooth to spinulose. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|phenology=Spores mature in late summer.
|habitat=Emergent or in shallow, cool, oligotrophic water of slightly acidic lakes, ponds, and streams
|distribution=Greenland;Alta.;B.C. Man.;N.B.;Nfld.;N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Utah;Vt.;Wash.;Wis.;circumboreal.
|discussion=<p>North American plants of <i>Isoëtes echinospora</i>, which bear stomata, have been called I. muricata or <i>I. echinospora</i> var. braunii to distinguish them from European plants of <i>I. echinospora</i>, which do not have stomata.</p><!--
--><p><i>Isoëtes echinospora</i> is a distinct species but has considerable variation, especially in size, color, and form of leaves. It is the most commonly encountered quillwort in oligotrophic, noncalcareous lakes and ponds of northeastern North America.</p><!--
--><p><i>Isoëtes echinospora</i> hybridizes with <i>I. bolanderi</i>; <i>I. engelmannii</i> [ = I. x eatonii Dodge (later synonym = I. x gravesii A. A. Eaton)]; <i>I. lacustris</i> [ = I. x hickeyi Taylor & Luebke]; <i>I. maritima</i>; <i>I. riparia</i> [ = I. x dodgei A. A. Eaton]; and <i>I. tuckermanii</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Isoëtes echinospora
|author=
|authority=Durieu
|rank=species
|parent rank=genus
|synonyms=Isoëtes braunii;Isoëtes echinospospora subsp. muricata;Isoëtes echinospora var. boottii;Isoëtes echinospora var. braunii;Isoëtes echinospora var. muricata;Isoëtes muricata;Isoëtes setacea subsp. muricata
|basionyms=
|family=Isoëtaceae
|phenology=Spores mature in late summer.
|habitat=Emergent or in shallow, cool, oligotrophic water of slightly acidic lakes, ponds, and streams
|distribution=Greenland;Alta.;B.C. Man.;N.B.;Nfld.;N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;N.H.;N.J.;N.Y.;Ohio;Oreg.;Pa.;R.I.;Utah;Vt.;Wash.;Wis.;circumboreal.
|reference=None
|publication title=Bull. Soc. Bot. France
|publication year=1861
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_152.xml
|genus=Isoëtes
|species=Isoëtes echinospora
}}<!--

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