Difference between revisions of "Potamogeton oblongus"
Annali di Botanica 1(2): 102. 1802.
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|common_names=Potamot oblong | |common_names=Potamot oblong | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
|synonyms= | |synonyms= | ||
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|elevation=10–100 m | |elevation=10–100 m | ||
|distribution=St. Pierre and Miquelon;Nfld. and Labr. (Nfld.);N.S.;Europe;n Africa;Atlantic Islands (Azores). | |distribution=St. Pierre and Miquelon;Nfld. and Labr. (Nfld.);N.S.;Europe;n Africa;Atlantic Islands (Azores). | ||
| + | |introduced=true | ||
|tables= | |tables= | ||
|references= | |references= | ||
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|publication title=Annali di Botanica | |publication title=Annali di Botanica | ||
|publication year=1802 | |publication year=1802 | ||
| − | |special status= | + | |special status=Introduced |
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V22/V22_405.xml |
|genus=Potamogeton | |genus=Potamogeton | ||
|species=Potamogeton oblongus | |species=Potamogeton oblongus | ||
Revision as of 21:22, 27 May 2020
Rhizome present. Cauline stems terete, without spots, 5–30 cm; nodal glands absent. Turions absent. Leaves both submersed and floating or only submersed, ± spirally arranged. Submersed 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. Floating 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). Inflorescences unbranched, emersed; peduncles not dimorphic, erect to slightly recurved, cylindric, 4–12 cm; spikes not dimorphic, cylindric, 20–40 mm. Fruits 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. 2n = 26.
Phenology: Flowering July–August.
Habitat: Acid to neutral waters of ponds, lakes, and occasionally streams
Elevation: 10–100 m
Distribution
Introduced; St. Pierre and Miquelon, Nfld. and Labr. (Nfld.), N.S., Europe, n Africa, Atlantic Islands (Azores).
Discussion
Selected References
None.