View source for Potamogeton oblongus

{{Treatment/ID
|accepted_name=Potamogeton oblongus
|accepted_authority=Viviani
|publications={{Treatment/Publication
|title=Annali di Botanica
|place=1(2): 102. 1802
|year=1802
}}
|common_names=Potamot oblong
|basionyms=
|synonyms=
|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton oblongus
|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 oblongus]]</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, 5–30 cm; nodal glands absent. <b>Turions</b> absent. <b>Leaves</b> both submersed and floating or only submersed, &#177; spirally arranged. <b>Submersed</b> leaves petiolate, lax; stipules persistent, conspicuous, convolute, free from blade, greenish, not ligulate, to 3 cm, not fibrous, not shredding at tip, apex acute; petioles 1–3(–8) cm; blade dark green, lanceolate to occasionally ovate, occasionally arcuate, 3–13 cm × 4–15(–44) mm, base acute, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, acute, lacunae in 2–4 rows each side of midvein; veins 7–11. <b>Floating</b> leaves: petioles continuous in color to apex, 1–17 cm; blade adaxially reddish brown, ovate, 3–8(–10) cm × 10–46 mm, base rounded or slightly cordate, apex obtuse, acute, or somewhat apiculate; veins (11–)15–19(–21). <b>Inflorescences</b> unbranched, emersed; peduncles not dimorphic, erect to slightly recurved, cylindric, 4–12 cm; spikes not dimorphic, cylindric, 20–40 mm. <b>Fruits</b> sessile, dark reddish brown, obovoid to orbicularoid, compressed, not abaxially or laterally keeled, (1.6–)2–2.5 × (1.2–)1.5–2.1 mm; beak minute or obsolete, recurved; sides without basal tubercles; embryo with 1 full spiral. <b>2n</b> = 26.</span><!--

-->{{Treatment/Body
|phenology=Flowering July–August.
|habitat=Acid to neutral waters of ponds, lakes, and occasionally streams
|elevation=10–100 m
|distribution=St. Pierre and Miquelon;Nfld. and Labr. (Nfld.);N.S.;Europe;n Africa;Atlantic Islands (Azores).
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Potamogeton oblongus
|authority=Viviani
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Potamogetonaceae
|phenology=Flowering July–August.
|habitat=Acid to neutral waters of ponds, lakes, and occasionally streams
|elevation=10–100 m
|distribution=St. Pierre and Miquelon;Nfld. and Labr. (Nfld.);N.S.;Europe;n Africa;Atlantic Islands (Azores).
|introduced=true
|reference=None
|publication title=Annali di Botanica
|publication year=1802
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V22/V22_405.xml
|genus=Potamogeton
|species=Potamogeton oblongus
}}<!--

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