View source for Potamogeton praelongus

{{Treatment/ID
|accepted_name=Potamogeton praelongus
|accepted_authority=Wulfen
|publications={{Treatment/Publication
|title=Arch. Bot. (Leipzig)
|place=3: 331. 1805
|year=1805
}}
|common_names=White-stemmed pondweed;potamot à longs pédoncules
|basionyms=
|synonyms=
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton praelongus
|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 praelongus]]</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 210 cm; nodal glands absent. <b>Turions</b> absent. <b>Leaves</b> submersed, &#177; spirally arranged, sessile, lax; stipules persistent, conspicuous, convolute, free from blade, white to green, not ligulate, 3–8.1 cm, fibrous, shredding at apex; blade pale green, rarely olive green, linear-lanceolate, not arcuate, 0.8–2.8 cm × 11–46 mm, base clasping, without basal lobes, margins entire, rarely crispate, apex hoodlike, splitting when pressed, obtuse, lacunae absent; veins 11–33. <b>Inflorescences</b> emersed, unbranched; peduncles not dimorphic, terminal or axillary, erect to spreading, cylindric, 9.5–53 cm; spikes not dimorphic, cylindric, 34–75 mm. <b>Fruits</b> sessile, greenish brown, obovoid, turgid, abaxially keeled, occasionally laterally keeled, 4–5.7 × 3.2–4 mm, lateral keels when present without points; 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=Neutral to alkaline waters of lakes, rivers, and streams
|elevation=Greenland; 100–3000 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Idaho;Ind.;Iowa;Maine;Mass.;Mich.;Minn.;Mont.;Nebr.;N.H.;N.J.;N.Y.;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wis.;Wyo.;Mexico;Eurasia.
|discussion=<p><i>Potamogeton praelongus</i> is one of the easiest pondweeds to identify with its submersed leaves only clasping the more or less zigzagged stem. The persistent, hugelarge, white stipules provide another clue to this species.</p><!--
--><p>Four hybrids, <i>Potamogeton perfoliatus</i> × <i>P. praelongus</i> (= P. × cognatus Ascherson & Graebner), <i>P. alpinus</i> × <i>P. praelongus</i> (= P. × griffithii A. Bennett), <i>P. crispus</i> × <i>P. praelongus</i> (= P. × undulatus Wolfgang ex Schultes & Schultes f.), and <i>P. gramineus</i> × <i>P. praelongus</i> (= P. × vilnensis Galinus), have been described.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Potamogeton praelongus
|authority=Wulfen
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering summer–fall.
|habitat=Neutral to alkaline waters of lakes, rivers, and streams
|elevation=Greenland; 100–3000 m
|distribution=Greenland;Alta.;B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.W.T.;N.S.;Nunavut;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Calif.;Colo.;Conn.;Idaho;Ind.;Iowa;Maine;Mass.;Mich.;Minn.;Mont.;Nebr.;N.H.;N.J.;N.Y.;Oreg.;Pa.;S.Dak.;Utah;Vt.;Wis.;Wyo.;Mexico;Eurasia.
|reference=None
|publication title=Arch. Bot. (Leipzig)
|publication year=1805
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V22/V22_559.xml
|genus=Potamogeton
|species=Potamogeton praelongus
}}<!--

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