Difference between revisions of "Isoëtes echinospora"
Bull. Soc. Bot. France 8:164. 1861.
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|phenology=Spores mature in late summer. | |phenology=Spores mature in late summer. | ||
|habitat=Emergent or in shallow, cool, oligotrophic water of slightly acidic lakes, ponds, and streams | |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. | + | |distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (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><!-- | |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> 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><!-- | ||
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|phenology=Spores mature in late summer. | |phenology=Spores mature in late summer. | ||
|habitat=Emergent or in shallow, cool, oligotrophic water of slightly acidic lakes, ponds, and streams | |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. | + | |distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (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 | |reference=None | ||
|publication title=Bull. Soc. Bot. France | |publication title=Bull. Soc. Bot. France | ||
|publication year=1861 | |publication year=1861 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V2/V2_152.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes echinospora | |species=Isoëtes echinospora | ||
Revision as of 21:10, 27 May 2020
Plants usually aquatic, occasionally emergent. Rootstock nearly globose, 2-lobed. Leaves ± deciduous, bright green to reddish green, pale toward base, spirally arranged, to 25(–40) cm, pliant, gradually tapering toward tip. Velum covering less than 1/2 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 400–550 μm diam., echinate with thin, sharp spines; girdle obscure. Microspores gray to light brown in mass, 20–30 μm, smooth to spinulose. 2n = 22.
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. and Labr. (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
North American plants of Isoëtes echinospora, which bear stomata, have been called I. muricata or I. echinospora var. braunii to distinguish them from European plants of I. echinospora, which do not have stomata.
Isoëtes echinospora 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.
Isoëtes echinospora hybridizes with I. bolanderi; I. engelmannii [ = I. x eatonii Dodge (later synonym = I. x gravesii A. A. Eaton)]; I. lacustris [ = I. x hickeyi Taylor & Luebke]; I. maritima; I. riparia [ = I. x dodgei A. A. Eaton]; and I. tuckermanii.
Selected References
None.