View source for Potamogeton zosteriformis

{{Treatment/ID
|accepted_name=Potamogeton zosteriformis
|accepted_authority=Fernald
|publications={{Treatment/Publication
|title=Memoirs of the american academy of arts and science
|place=n.s. 17:36. 1932
|year=1932
}}
|common_names=Flatstem pondweed;potamot zostériforme
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potamogeton zosterifolius subsp. zosteriformis
|authority=(Fernald) Hultén
|rank=subspecies
}} {{Treatment/ID/Synonym
|name=Potamogeton zosterifolius var. americanus
|authority=A. Bennett
|rank=variety
}}
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton zosteriformis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Potamogetonaceae]]</div><div class="higher-taxon"><small>genus</small>[[Potamogeton]]</div><div class="higher-taxon"><small>species</small>[[Potamogeton zosteriformis]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Rhizomes </b>absent. <b>Cauline</b> stems conspicuously flattened ("wing-flattened"), without spots, 60–120 cm; glands absent or rarely present, when present, gold, 0.3 mm diam. <b>Turions</b> common, terminal or lateral, 4–7.5 × 2–4.5 cm, firm; leaves &#177; 2-ranked; outer leaves 3–4 per side, base not corrugate, apex acute; inner leaves undifferentiated. <b>Leaves</b> submersed, &#177; 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. <b>Inflorescences</b> unbranched, emersed; peduncles not dimorphic, terminal, erect to ascending, occasionally recurved, cylindric, 2–5 cm; spikes not dimorphic, cylindric, 15–30 mm. <b>Fruits</b> 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. <b>2n</b> = 52.</span><!--

-->{{Treatment/Body
|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=<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=
|references={{Treatment/Reference
|id=hellquist1986a
|text=Hellquist, C. B. and G. E. Crow. 1986. Potamogeton ´ haynesii (Potamogetonaceae), a new species from northeastern North America. Brittonia 38: 415--419.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Potamogeton zosteriformis
|authority=Fernald
|rank=species
|parent rank=genus
|synonyms=Potamogeton zosterifolius subsp. zosteriformis;Potamogeton zosterifolius var. americanus
|basionyms=
|family=Potamogetonaceae
|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.
|reference=hellquist1986a
|publication title=Memoirs of the american academy of arts and science
|publication year=1932
|special status=Illustrated;Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_16.xml
|genus=Potamogeton
|species=Potamogeton zosteriformis
}}<!--

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