View source for Potamogeton hillii

{{Treatment/ID
|accepted_name=Potamogeton hillii
|accepted_authority=Morong
|publications={{Treatment/Publication
|title=Botanical Gazette
|place=6: 290, fig. 3. 1881
|year=1881
}}
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Potamogeton porteri
|authority=Fernald
|rank=species
}}
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton hillii
|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 hillii]]</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 slightly compressed, without spots, 30–60 cm; glands rare, when present, brown to green, 0.1–0.3 mm diam. <b>Turions</b> terminal, rare, 2.8–3 cm × 1.5–3 mm, soft; leaves &#177; 2-ranked; outer leaves 3–4 per side, base not corrugate, apex acute to apiculate; inner leaves undifferentiated. <b>Leaves</b> submersed, &#177; spirally arranged, sessile, delicate; stipules persistent, inconspicuous, convolute, free from blade, white to light brown, not ligulate, 0.7–1.6 cm, slightly fibrous, rarely shredding at tip, apex obtuse; blade pale green to olive-green, linear, not arcuate, 2–6 cm × 0.6–2.5(–4) mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, apiculate to bristle-tipped or rarely blunt, lacunae in 1–2 rows each side of midrib; veins 3. <b>Inflorescences</b> unbranched, emersed; peduncles not dimorphic, axillary and/or terminal, erect to ascending, rarely recurved, slightly clavate, 6–13.5 mm; spikes not dimorphic, globose, (2–) 4–7 mm. <b>Fruits</b> brown to light greenish brown, ovoid to orbicular, turgid, sessile, abaxially and laterally keeled (3-keeled), 2.3–4 × 2–3.2 mm, lateral keels without points; beak erect, 0.3–0.7 mm; sides without basal tubercles; embryo with 1 full spiral. <b>Chromosome</b> number unknownnot available.</span><!--

-->{{Treatment/Body
|phenology=Flowering and fruiting summer.
|habitat=Alkaline waters of marshes, ponds, lakes, and slow-moving streams
|elevation=50–400 m
|distribution=Ont.;Conn.;Mass.;Mich.;N.Y.;Ohio;Pa.;Vt.;Va.;Wis.
|discussion=<p><i>Potamogeton hillii</i> is an easily recognized species either in fruit or when sterile. The leaf blade has a bristle tip and five or fewer veins. Those characters combined with the usual absence of nodal glands will separate this species from all other North American linear-leaved species. Ecologically, it is consistently found in more alkaline waters than any other North American pondweed. A study of 35 localities established the mean to be 124.1 mg/l CaCO3 (C. B. Hellquist 1984).</p>
|tables=
|references={{Treatment/Reference
|id=hellquist1984a
|text=Hellquist, C. B. 1984. Observations of Potamogeton hillii Morong in North America. Rhodora 86: 101--111.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Potamogeton hillii
|authority=Morong
|rank=species
|parent rank=genus
|synonyms=Potamogeton porteri
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering and fruiting summer.
|habitat=Alkaline waters of marshes, ponds, lakes, and slow-moving streams
|elevation=50–400 m
|distribution=Ont.;Conn.;Mass.;Mich.;N.Y.;Ohio;Pa.;Vt.;Va.;Wis.
|reference=hellquist1984a
|publication title=Botanical Gazette
|publication year=1881
|special status=Endemic
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_66.xml
|genus=Potamogeton
|species=Potamogeton hillii
}}<!--

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