View source for Potamogeton ogdenii

{{Treatment/ID
|accepted_name=Potamogeton ogdenii
|accepted_authority=Hellquist & R. L. Hilton
|publications={{Treatment/Publication
|title=Systematic Botany
|place=8: 88, figs. 1–3, plates 1–2, figs. 1–3. 1983
|year=1983
}}
|common_names=Ogden's pondweed;potamot d’Ogden
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms=
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton ogdenii
|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 ogdenii]]</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 compressed-filiform, without spots, to 50 cm; glands green, golden brown to dark brown, 0.2–0.6 mm diam. <b>Turions</b> terminal or lateral, uncommon, 3.7–9.9 × 2.6–6 cm, soft to hard; leaves flattened with outer and inner leaves in same plane; outer leaves 1–2 per side, base not corrugate, apex apiculate; inner leaves undifferentiated or rolled into hardened, fusiform structure. <b>Leaves</b> submersed, &#177; spirally arranged, sessile, rigid; stipules persistent, inconspicuous, convolute, free from blade, brown or rarely white, not ligulate, 0.9–2.1 cm, slightly fibrous, partially shredding at tip, apex obtuse; blade somewhat reddish to olive-green, linear, not arcuate, 1.5–10 cm × 1.2–2.9 mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, cuspidate to bristle-tipped, lacunae present or absent, in 0–3 rows each side of midvein; veins 3–9(–13). <b>Inflorescences</b> unbranched, emersed; peduncles not dimorphic, terminal or occasionally axillary, erect or rarely recurved, slightly clavate, 1–3 cm; spikes not dimorphic, cylindric, 5–11 mm. <b>Fruits</b> sessile, dark green, orbicular, turgid, abaxial keel obscure, lateral keels obscure or absent, 2.5–3 × 2.2–3 mm, lateral keels if present without points; beak erect, 0.5 mm; sides without basal tubercles; embryo with 1 full spiral. <b>Chromosome</b> number unknownnot available.</span><!--

-->{{Treatment/Body
|phenology=Flowering mid summer–fall.
|habitat=Alkaline waters of ponds and lakes
|elevation=100–300 m
|distribution=Ont.;Conn.;Mass.;N.Y.;Vt.
|discussion=<p><i>Potamogeton ogdenii</i> is an extremely local species, probably known from fewer than a dozen localities. The species is herein reported for the first time from Canada, being known from that country by a single collection made in 1987.</p><!--
--><p>Of conservation concern.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Potamogeton ogdenii
|authority=Hellquist & R. L. Hilton
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering mid summer–fall.
|habitat=Alkaline waters of ponds and lakes
|elevation=100–300 m
|distribution=Ont.;Conn.;Mass.;N.Y.;Vt.
|reference=None
|publication title=Systematic Botany
|publication year=1983
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_57.xml
|genus=Potamogeton
|species=Potamogeton ogdenii
}}<!--

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