View source for Potamogeton bicupulatus

{{Treatment/ID
|accepted_name=Potamogeton bicupulatus
|accepted_authority=Fernald
|publications={{Treatment/Publication
|title=Memoirs of the american academy of arts and science
|place=17: 112. 1932
|year=1932
}}
|common_names=Snail-seed pondweed
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potamogeton diversifolius var. trichophyllus
|authority=Morong
}}
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton bicupulatus
|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 bicupulatus]]</div></div>
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Rhizomes </b>present. <b>Cauline</b> stems compressed, without spots, 10–25 cm; glands absent. <b>Turions</b> absent. <b>Leaves</b> both submersed and floating or floating absent, &#177; spirally arranged. <b>Submersed</b> leaves sessile, lax; stipules persistent to deliquescent, inconspicuous, convolute, adnate to blade for less than ½ stipule length, light green, ligulate, 0.2–1.2 cm, not fibrous, not shredding at tip, apex obtuse; blade light green to rarely brown, linear-setaceous, not arcuate, 1.5–11 cm × 0.1–0.4(–0.6) mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, tapering, lacunae absent; veins 1. <b>Floating</b> leaves petiolate; petioles continuous in color to apex, 5–35 mm; blade adaxially light green, lanceolate-elliptic to broadly elliptic, 0.6–2.3(–2.8) cm × 1–11 mm, base tapering or rounded, apex acute to long tapering; veins 3–7. <b>Inflorescences</b> unbranched; peduncles dimorphic, submersed axillary, somewhat recurved, clavate, 1–10 mm, emersed axillary or terminal, erect to slightly recurved, slightly clavate, 3.5–22 mm; spikes dimorphic, submersed, globular to ellipsoid, 1.5–7 mm, emersed ellipsoid to cylindric, 3–14 mm. <b>Fruits</b> sessile, greenish brown, somewhat orbicular, compressed, abaxially keeled, laterally keeled, 1.1–2.1 × 1.1–2 mm, lateral keel without points; beak absent; sides without basal tubercles; embryo with more than 1 full spiral.</span><!--

-->{{Treatment/Body
|phenology=Flowering early summer–fall.
|habitat=Acidic waters of ponds, lakes, and streams
|elevation=0–300 m
|distribution=Ont.;Conn.;Del.;Ind.;Maine;Mass.;Mich.;N.H.;N.Y.;Pa.;R.I.;Tenn.;Vt.;Va.;Wis.
|discussion=<p>Potamogeton bicupulatus is an uncommon species of the acid lakes and streams of northeastern United States and southern Canada. It is the final third species we have with dimorphic inflorescences and embryos with more than one full spiral. It can be separated from the other two, Potamogeton spirillus and P. diversifolius, because it has very narrow submersed leaves without lacunae and fruits with lateral keels without sharp points.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Potamogeton bicupulatus
|author=
|authority=Fernald
|rank=species
|parent rank=genus
|synonyms=Potamogeton diversifolius var. trichophyllus
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering early summer–fall.
|habitat=Acidic waters of ponds, lakes, and streams
|elevation=0–300 m
|distribution=Ont.;Conn.;Del.;Ind.;Maine;Mass.;Mich.;N.H.;N.Y.;Pa.;R.I.;Tenn.;Vt.;Va.;Wis.
|reference=None
|publication title=Memoirs of the american academy of arts and science
|publication year=1932
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V22/V22_332.xml
|genus=Potamogeton
|species=Potamogeton bicupulatus
}}<!--

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