View source for Potamogeton alpinus

{{Treatment/ID
|accepted_name=Potamogeton alpinus
|accepted_authority=Balbis
|publications={{Treatment/Publication
|title=Misc. Bot.
|place=13. 1804
|year=1804
}}
|common_names=Potamot alpin
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potamogeton alpinus subsp. tenuifolius
|authority=(Rafinesque) Hultén
}} {{Treatment/ID/Synonym
|name=Potamogeton alpinus var. subellipticus
|authority=(Fernald) Ogden
}} {{Treatment/ID/Synonym
|name=Potamogeton alpinus var. tenuifolius
|authority=(Rafinesque) Ogden
}} {{Treatment/ID/Synonym
|name=Potamogeton tenuifolius
|authority=unknown
}} {{Treatment/ID/Synonym
|name=Potamogeton tenuifolius var. subellipticus
|authority=Fernald
}}
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton alpinus
|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 alpinus]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Rhizome </b>present. <b>Cauline</b> stems terete, without spots, to 200 cm; nodal glands absent. <b>Turions</b> absent. <b>Leaves</b> submersed and floating or floating absent, &#177; spirally arranged. <b>Submersed</b> leaves sessile, lax; stipules persistent, inconspicuous, convolute, free from blade, light brown to reddish, not ligulate, (1.2–)1.5–2.5(–4) cm, not fibrous, not shredding at tip, apex blunt; blade reddish green, oblong-linear to linear-lanceolate, not arcuate, 4.5–18(–25) cm × 5–20 mm, base rounded, without basal lobes, slightly clasping, margins entire, not crispate, apex not hoodlike, obtuse or acute, lacunae in 0–6 rows each side of midvein; veins 7–9. <b>Floating</b> leaves: petioles continuous in color to apex, 0.1–1.2 cm; blade reddish green, elliptic or oblanceolate to obovate or oblong-linear, 4–7(–10) cm × 10–25(–40) mm, base gradually tapering into petiole, apex obtuse or acute; veins (7–)9–13(–15). <b>Inflorescences</b> unbranched, emersed; peduncles not dimorphic, terminal or axillary, erect, cylindric, 3–10(–16) cm; spikes not dimorphic, cylindric, 10–35 mm. <b>Fruits</b> pedicellate, tawny olive-green, obovoid, plump, turgid, abaxially keeled, laterally keeled or not, (2.5–)3–3.5 × (1.7–)2–2.4 mm, lateral keels when present without points; beak abaxially curved, 0.5–0.9 mm; sides without basal tubercles; embryo with 1 full spiral. <b>2n</b> = 52.</span><!--

-->{{Treatment/Body
|phenology=Flowering early summer–fall.
|habitat=Ponds, lakes, and slow-moving streams
|elevation=400–2500 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;Nev.;N.H.;N.J.;N.Y.;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wash.;Wis.;Wyo.;Europe;Asia Eurasia.
|discussion=<p>Plants of <i>Potamogeton alpinus</i> often are red whenever taken from the water, a feature that makes this species quite distinctive.</p><!--
--><p>Two varieties, <i>Potamogeton alpinus</i> var. tenuifolius and var. subellipticus, have been recognized in North America, based mainly on submersed leaf shape. Plants bearing both leaf types have been observed in the same population; hence the varieties are not recognized.</p><!--
--><p>Four hybrids, <i>Potamogeton alpinus</i> × <i>P. nodosus</i> (= P. ×subobtusus Hagstr&ouml;m), <i>P. alpinus</i> × <i>P. gramineus</i> (= P. xnericius Hagstr&ouml;m), <i>P. alpinus</i> × <i>P. praelongus</i> (= P. ×griffithii A. Bennett), and <i>P. alpinus</i> × <i>P. perfoliatus</i> (= P. ×prussicus Hagstr&ouml;m), have been described.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Potamogeton alpinus
|author=
|authority=Balbis
|rank=species
|parent rank=genus
|synonyms=Potamogeton alpinus subsp. tenuifolius;Potamogeton alpinus var. subellipticus;Potamogeton alpinus var. tenuifolius;Potamogeton tenuifolius;Potamogeton tenuifolius var. subellipticus
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering early summer–fall.
|habitat=Ponds, lakes, and slow-moving streams
|elevation=400–2500 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Idaho;Maine;Mass.;Mich.;Minn.;Mont.;Nev.;N.H.;N.J.;N.Y.;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wash.;Wis.;Wyo.;Europe;Asia Eurasia.
|reference=None
|publication title=Misc. Bot.
|publication year=1804
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V22/V22_508.xml
|genus=Potamogeton
|species=Potamogeton alpinus
}}<!--

-->[[Category:Treatment]][[Category:Potamogeton]]