Difference between revisions of "Potamogeton zosteriformis"
Memoirs of the american academy of arts and science n.s. 17:36. 1932.
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|name=Potamogeton zosterifolius subsp. zosteriformis | |name=Potamogeton zosterifolius subsp. zosteriformis | ||
|authority=(Fernald) Hultén | |authority=(Fernald) Hultén | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=Potamogeton zosterifolius var. americanus | |name=Potamogeton zosterifolius var. americanus | ||
|authority=A. Bennett | |authority=A. Bennett | ||
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|elevation=0–15003000 m | |elevation=0–15003000 m | ||
|distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Conn.;Idaho;Ill.;Ind.;Iowa;Kans.;Maine;Mass.;Mich.;Minn.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wash.;Wis.;Wyo. | |distribution=Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Conn.;Idaho;Ill.;Ind.;Iowa;Kans.;Maine;Mass.;Mich.;Minn.;Mont.;Nebr.;Nev.;N.H.;N.J.;N.Y.;N.Dak.;Ohio;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wash.;Wis.;Wyo. | ||
| − | |discussion=<p>One hybrid, Potamogeton zosteriformis × P. strictifolius, has been described and has been given the name P. ×haynesii Hellquist & G. E. Crow and is known from northern Michigan, Minnesota, Vermont, and southern Canada.</p> | + | |discussion=<p>One hybrid, <i>Potamogeton zosteriformis</i> × <i>P. strictifolius</i>, has been described and has been given the name P. ×haynesii Hellquist & G. E. Crow and is known from northern Michigan, Minnesota, Vermont, and southern Canada.</p> |
|tables= | |tables= | ||
|references={{Treatment/Reference | |references={{Treatment/Reference | ||
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|publication year=1932 | |publication year=1932 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V22/V22_16.xml |
|genus=Potamogeton | |genus=Potamogeton | ||
|species=Potamogeton zosteriformis | |species=Potamogeton zosteriformis | ||
Revision as of 15:56, 18 September 2019
Rhizomes absent. Cauline stems conspicuously flattened ("wing-flattened"), without spots, 60–120 cm; glands absent or rarely present, when present, gold, 0.3 mm diam. Turions common, terminal or lateral, 4–7.5 × 2–4.5 cm, firm; leaves ± 2-ranked; outer leaves 3–4 per side, base not corrugate, apex acute; inner leaves undifferentiated. Leaves submersed, ± spirally arranged, sessile, rigid; stipules persistent, conspicuous, convolute, free from blade, white, not ligulate, 1.5–3.5 cm, fibrous, shredding at tip, apex obtuse to acuminate; blade light green, linear, not arcuate, 10–20 cm × 2–5 mm, base rounded, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, blunt, acuminate, or bristle-tipped, lacunae absent; veins 15–35. Inflorescences unbranched, emersed; peduncles not dimorphic, terminal, erect to ascending, occasionally recurved, cylindric, 2–5 cm; spikes not dimorphic, cylindric, 15–30 mm. Fruits light green to olive-green, quadrate-oblong or nearly orbicular, turgid, sessile, with abaxially keeled, not laterally keeled, 4–5 × 3–3.5 mm, keel winglike; beak erect, 0.6–1 mm; sides without basal tubercles; embryo with 1 full spiral. 2n = 52.
Phenology: Flowering summer–fall.
Habitat: Lakes, ponds, and slow streams
Elevation: 0–15003000 m
Distribution
Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Calif., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., S.Dak., Utah, Vt., Wash., Wis., Wyo.
Discussion
One hybrid, Potamogeton zosteriformis × P. strictifolius, has been described and has been given the name P. ×haynesii Hellquist & G. E. Crow and is known from northern Michigan, Minnesota, Vermont, and southern Canada.