Difference between revisions of "Potamogeton groenlandicus"
Kongl. Svenska Vetenskapsakademiens Handlingar n.s. 55(5): 127. 1916.
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|name=Potamogeton pusillus subsp. groenlandicus | |name=Potamogeton pusillus subsp. groenlandicus | ||
|authority=(Hagström) Boch | |authority=(Hagström) Boch | ||
| + | |rank=subspecies | ||
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|hierarchy=Potamogetonaceae;Potamogeton;Potamogeton groenlandicus | |hierarchy=Potamogetonaceae;Potamogeton;Potamogeton groenlandicus | ||
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name=Potamogeton groenlandicus | name=Potamogeton groenlandicus | ||
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|authority=Hagström | |authority=Hagström | ||
|rank=species | |rank=species | ||
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|publication year=1916 | |publication year=1916 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V22/V22_483.xml |
|genus=Potamogeton | |genus=Potamogeton | ||
|species=Potamogeton groenlandicus | |species=Potamogeton groenlandicus | ||
Revision as of 19:58, 16 December 2019
Rhizomes absent. Cauline stems terete, without spots, 20–50 cm; glands white, 0.1–0.7 mm diam. Turions terminal or axillary, common, 4.2–8.4 cm × 1.4–2.5 mm, soft; leaves ± 4-ranked; outer leaves 2 per side, base without corrugations, apex acute to apiculate; inner leaves unmodified. Leaves submersed, ± spirally arranged, sessile, delicate; stipules deliquescent to persistent, inconspicuous, convolute, free from blade, brown, not ligulate, 0.45–1.91 cm, not fibrous, not shredding at tip, apex obtuse; blade pale to deep green, linear, not arcuate, 2.6–8.8 cm × 0.7–1.7 mm, base slightly tapering, without basal lobes, not clasping, margins entire, not crispate, apex not hoodlike, acute to apiculate, lacunae absent or present, 0–3 rows each side of midrib; veins 7–11. Inflorescences unbranched, emersed; peduncles not dimorphic, terminal, erect, cylindric, 20 mm; spikes not dimorphic, cylindric, 5 mm. Fruits not laterally keeled, 2.6–2.7 × 2 mm; beak erect, 0.3 mm; sides without basal tubercles; embryo with 1 full coil. 2n = 26.
Phenology: Flowering late summer.
Habitat: Ponds and lakes
Elevation: 10–450 m
Discussion
Of conservation concern.
Selected References
None.