Difference between revisions of "Potamogeton strictifolius"
J. Bot. 40: 148. 1902.
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|common_names=Potamot à feuilles raides | |common_names=Potamot à feuilles raides | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=E | ||
| + | |label=Endemic | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
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|habitat=Alkaline waters of lakes and slow-moving streams | |habitat=Alkaline waters of lakes and slow-moving streams | ||
|elevation=50–2000 m | |elevation=50–2000 m | ||
| − | |distribution=Alta.;Man.;N.B.;Ont.;Que.;Sask.;Yukon;Conn.;Ill.;Ind.;Maine;Mass.;Mich.;Minn.;Nebr.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Utah; | + | |distribution=Alta.;Man.;N.B.;Ont.;Que.;Sask.;Yukon;Conn.;Ill.;Ind.;Maine;Mass.;Mich.;Minn.;Nebr.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Utah;Va.;Vt.;Wis.;Wyo. |
|discussion=<p><i>Potamogeton strictifolius</i> is a relatively uncommon species found in alkaline waters. Fairly rigid leaves of the species make floating onto paper unnecessary in the collecting process. The leaves have a tendency to become revolute during the growing season. The species superficially resembles several other species of linear-leaved pondweeds. Consequently, many specimens of this species have been misidentified as other species and vice versa. Thus, literature records are often suspect.</p><!-- | |discussion=<p><i>Potamogeton strictifolius</i> is a relatively uncommon species found in alkaline waters. Fairly rigid leaves of the species make floating onto paper unnecessary in the collecting process. The leaves have a tendency to become revolute during the growing season. The species superficially resembles several other species of linear-leaved pondweeds. Consequently, many specimens of this species have been misidentified as other species and vice versa. Thus, literature records are often suspect.</p><!-- | ||
--><p>One hybrid, <i>Potamogeton strictifolius</i> × <i>P. zosteriformis</i> (= P. × haynesii Hellquist & G. E. Crow), has been described.</p> | --><p>One hybrid, <i>Potamogeton strictifolius</i> × <i>P. zosteriformis</i> (= P. × haynesii Hellquist & G. E. Crow), has been described.</p> | ||
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|habitat=Alkaline waters of lakes and slow-moving streams | |habitat=Alkaline waters of lakes and slow-moving streams | ||
|elevation=50–2000 m | |elevation=50–2000 m | ||
| − | |distribution=Alta.;Man.;N.B.;Ont.;Que.;Sask.;Yukon;Conn.;Ill.;Ind.;Maine;Mass.;Mich.;Minn.;Nebr.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Utah; | + | |distribution=Alta.;Man.;N.B.;Ont.;Que.;Sask.;Yukon;Conn.;Ill.;Ind.;Maine;Mass.;Mich.;Minn.;Nebr.;N.Y.;N.Dak.;Ohio;Pa.;S.Dak.;Utah;Va.;Vt.;Wis.;Wyo. |
|reference=None | |reference=None | ||
|publication title=J. Bot. | |publication title=J. Bot. | ||
|publication year=1902 | |publication year=1902 | ||
| − | |special status= | + | |special status=Endemic |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_29.xml |
|genus=Potamogeton | |genus=Potamogeton | ||
|species=Potamogeton strictifolius | |species=Potamogeton strictifolius | ||
Latest revision as of 20:30, 5 November 2020
Rhizomes absent. Cauline stems terete, without spots, 27–95 cm; glands white, green, greenish brown, or gold, to 0.3 mm diam. Turions terminal or lateral, common, 2.5–4.8 cm × 0.8–2.2 mm, soft; leaves ± 2-ranked, flattened with outer and inner leaves in same plane; outer leaves 3–4 per side, base not corrugate, or rarely corrugate, apex acute; inner leaves undifferentiated. Leaves submersed, ± spirally arranged, rigid, sessile; stipules disintegrating, inconspicuous, connate, free from blade, white, not ligulate, 0.6–1.6 cm, fibrous, shredding at tip, apex obtuse; blade green to olive-green, linear, not arcuate, 1.2–6.3 cm × 0.6–2 mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, acute to nearly bristle-tipped, rarely obtuse to apiculate, lacunae absent; veins 3–5(–7). Inflorescences unbranched, emersed; peduncles not dimorphic, terminal, erect, rarely recurved, cylindric, rarely slightly clavate, 1–4.5 cm; spike not dimorphic, cylindric, 0.6–1.3 cm. Fruits sessile, green-brown, ovoid, turgid, not abaxially or laterally keeled, 1.9–2.1 × 1.3–1.8 mm; beak erect, 0.5–0.8 mm; sides without basal tubercles; embryo with 1 full spiral. 2n = 26.
Phenology: Flowering and fruiting summer–fall.
Habitat: Alkaline waters of lakes and slow-moving streams
Elevation: 50–2000 m
Distribution
Alta., Man., N.B., Ont., Que., Sask., Yukon, Conn., Ill., Ind., Maine, Mass., Mich., Minn., Nebr., N.Y., N.Dak., Ohio, Pa., S.Dak., Utah, Va., Vt., Wis., Wyo.
Discussion
Potamogeton strictifolius is a relatively uncommon species found in alkaline waters. Fairly rigid leaves of the species make floating onto paper unnecessary in the collecting process. The leaves have a tendency to become revolute during the growing season. The species superficially resembles several other species of linear-leaved pondweeds. Consequently, many specimens of this species have been misidentified as other species and vice versa. Thus, literature records are often suspect.
One hybrid, Potamogeton strictifolius × P. zosteriformis (= P. × haynesii Hellquist & G. E. Crow), has been described.
Selected References
None.