Difference between revisions of "Isoëtes lacustris"
Sp. Pl. 2: 1100. 1753.
Common names: Lake quillwort isoète lacustre
Synonyms: Isoëtes hieroglyphica A. A. Eaton Isoëtes macrospora Durieu
Treatment appears in FNA Volume 2.
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GeoffLevin (talk | contribs) m (Fixed Nfld. and Labr. distribution to match printed version.) |
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|name=Isoëtes hieroglyphica | |name=Isoëtes hieroglyphica | ||
|authority=A. A. Eaton | |authority=A. A. Eaton | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=Isoëtes macrospora | |name=Isoëtes macrospora | ||
|authority=Durieu | |authority=Durieu | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Isoëtaceae;Isoëtes;Isoëtes lacustris | |hierarchy=Isoëtaceae;Isoëtes;Isoëtes lacustris | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>aquatic, submerged. <b>Rootstock</b> nearly globose, 2-lobed. <b>Leaves</b> evergreen, dark green to reddish green, pala brown toward base, spirally arranged, to 25 cm, rigid, abruptly tapering to tip. <b>Velum</b> covering less than 1/2 of sporangium. <b>Sporangium</b> wall ± brown-streaked. <b>Megaspores</b> white, 55–750 μm diam., cristate to reticulate with branching to anastomosing ridges; girdle densely papillate or rarely smooth. <b>Microspores</b> gray in mass, 33–45 μm, paillose. <b>2n</b> = 110.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
| + | |phenology=Spores mature late summer. | ||
|habitat=Cool, oligotrophic, slightly acidic lakes and streams | |habitat=Cool, oligotrophic, slightly acidic lakes and streams | ||
| − | |distribution=Greenland;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I. Que.;Sask.;Conn.;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;R.I.;Tenn.;Vt.;Va.;Wis.;n;c Europe. | + | |distribution=Greenland;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;R.I.;Tenn.;Vt.;Va.;Wis.;n;c Europe. |
| − | |discussion=<p>Population of Isoëtes lacustris in Tennessee and Virginia are disjunct.</p><!-- | + | |discussion=<p>Population of <i>Isoëtes lacustris</i> in Tennessee and Virginia are disjunct.</p><!-- |
| − | --><p>North American plants of Isoëtes lacustris have been segregated as I. macrospora; both taxa are decaploids (2n = 110) and have similar leaf and spore morphology. Then cannot reliably be distinguished from each other except on the basis of geography.</p><!-- | + | --><p>North American plants of <i>Isoëtes lacustris</i> have been segregated as I. macrospora; both taxa are decaploids (2n = 110) and have similar leaf and spore morphology. Then cannot reliably be distinguished from each other except on the basis of geography.</p><!-- |
| − | --><p>Isoëtes lacustris is a totally submerged aquatic. Plants have been found at depths of more than 3 m. Plants with rugulate megaspores bearing smooth, rounded ridges and a smooth girdle have been called I. hieroglyphica A. A. Eaton [I. macrospora f. hieroglyphica (A. A. Eaton) N. E. Pfeiffer].</p><!-- | + | --><p><i>Isoëtes lacustris</i> is a totally submerged aquatic. Plants have been found at depths of more than 3 m. Plants with rugulate megaspores bearing smooth, rounded ridges and a smooth girdle have been called I. hieroglyphica A. A. Eaton [I. macrospora f. hieroglyphica (A. A. Eaton) N. E. Pfeiffer].</p><!-- |
| − | --><p>Isoëtes lacustris hibridizes with I. echinospora [ = I. x hickeyi W. C. Taylor & Luebke]; I. engelmannii; I. riparia [ = I. x jeffreyi D. M. Britton & Brunton]; and with I. tuckermanii [ = I. x harveyi A. A. Eaton].</p> | + | --><p><i>Isoëtes lacustris</i> hibridizes with <i>I. echinospora</i> [ = I. x hickeyi W. C. Taylor & Luebke]; <i>I. engelmannii</i>; <i>I. riparia</i> [ = I. x jeffreyi D. M. Britton & Brunton]; and with <i>I. tuckermanii</i> [ = I. x harveyi A. A. Eaton].</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Isoëtes lacustris | name=Isoëtes lacustris | ||
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|authority=Linnaeus | |authority=Linnaeus | ||
|rank=species | |rank=species | ||
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|basionyms= | |basionyms= | ||
|family=Isoëtaceae | |family=Isoëtaceae | ||
| + | |phenology=Spores mature late summer. | ||
|habitat=Cool, oligotrophic, slightly acidic lakes and streams | |habitat=Cool, oligotrophic, slightly acidic lakes and streams | ||
| − | |distribution=Greenland;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I. Que.;Sask.;Conn.;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;R.I.;Tenn.;Vt.;Va.;Wis.;n;c Europe. | + | |distribution=Greenland;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Conn.;Maine;Mass.;Mich.;Minn.;N.H.;N.Y.;R.I.;Tenn.;Vt.;Va.;Wis.;n;c Europe. |
|reference=None | |reference=None | ||
|publication title=Sp. Pl. | |publication title=Sp. Pl. | ||
|publication year=1753 | |publication year=1753 | ||
|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_398.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes lacustris | |species=Isoëtes lacustris | ||
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-->[[Category:Treatment]][[Category:Isoëtes]] | -->[[Category:Treatment]][[Category:Isoëtes]] | ||
Latest revision as of 22:32, 20 February 2024
Plants aquatic, submerged. Rootstock nearly globose, 2-lobed. Leaves evergreen, dark green to reddish green, pala brown toward base, spirally arranged, to 25 cm, rigid, abruptly tapering to tip. Velum covering less than 1/2 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 55–750 μm diam., cristate to reticulate with branching to anastomosing ridges; girdle densely papillate or rarely smooth. Microspores gray in mass, 33–45 μm, paillose. 2n = 110.
Phenology: Spores mature late summer.
Habitat: Cool, oligotrophic, slightly acidic lakes and streams
Distribution
Greenland, Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Sask., Conn., Maine, Mass., Mich., Minn., N.H., N.Y., R.I., Tenn., Vt., Va., Wis., n, c Europe.
Discussion
Population of Isoëtes lacustris in Tennessee and Virginia are disjunct.
North American plants of Isoëtes lacustris have been segregated as I. macrospora; both taxa are decaploids (2n = 110) and have similar leaf and spore morphology. Then cannot reliably be distinguished from each other except on the basis of geography.
Isoëtes lacustris is a totally submerged aquatic. Plants have been found at depths of more than 3 m. Plants with rugulate megaspores bearing smooth, rounded ridges and a smooth girdle have been called I. hieroglyphica A. A. Eaton [I. macrospora f. hieroglyphica (A. A. Eaton) N. E. Pfeiffer].
Isoëtes lacustris hibridizes with I. echinospora [ = I. x hickeyi W. C. Taylor & Luebke]; I. engelmannii; I. riparia [ = I. x jeffreyi D. M. Britton & Brunton]; and with I. tuckermanii [ = I. x harveyi A. A. Eaton].
Selected References
None.
Lower Taxa
None.