Overview

Distribution

National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Range Description

The species is a temperate circumboreal species, occurring throughout most of Europe, the Caucasus and western Asia east through northern India and Myanmar to Japan and Korea, it also occurs in North America.
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Greenland; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon; Alaska, Calif., Colo., Idaho, Maine, Mass., Mich., Minn., Mont., Nev., N.H., N.J., N.Y., Oreg., Pa., S.Dak., Utah, Vt., Wash., Wis., Wyo.; Europe; Asia Eurasia.
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Distribution: Temperate and arctic regions of Asia, Europe and N. America.
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Physical Description

Morphology

Description

Differs from Potamogeton nodosus by its sessile, oblanceolate to elliptic, submerged leaves, cuneate or semiamplexicaul at the base, apices rounded or obtuse. Lamina of petiolate floating leaves 7-9 cm long, c. 1.8 cm broad, 7-many-nerved, cuneate at the base, obtuse or rounded at the apex, with entire margins. Fruitlets 2.5-3 mm long.
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Description

Rhizome present. Cauline stems terete, without spots, to 200 cm; nodal glands absent. . Turions absent. Leaves submersed and floating or floating absent, ± spirally arranged. Submersed leaves sessile, lax; stipules persistent, inconspicuous, convolute, free from blade, light brown to reddish, not ligulate, (1.2--)1.5--2.5(--4) cm, not fibrous, not shredding at tip, apex blunt; blade reddish green, oblong-linear to linear-lanceolate, not arcuate, 4.5--18(--25) cm ´ 5--20 mm, base rounded, without basal lobes, slightly clasping, margins entire, not crispate, apex not hoodlike, obtuse or acute, lacunae in 0--6 rows each side of midvein; veins 7--9. Floating leaves: petioles continuous in color to apex, 0.1--1.2 cm; blade reddish green, elliptic or oblanceolate to obovate or oblong-linear, 4--7(--10) cm ´ 10--25(--40) mm, base gradually tapering into petiole, apex obtuse or acute; veins (7--)9--13(--15). Inflorescences unbranched, emersed; peduncles not dimorphic, terminal or axillary, erect, cylindric, 3--10(--16) cm; spikes not dimorphic, cylindric, 10--35 mm. Fruits pedicellate, tawny olive-green, obovoid, plump, turgid, abaxially keeled, laterally keeled or not, (2.5--)3--3.5 ´ (1.7--)2--2.4 mm, lateral keels when present without points; beak abaxially curved, 0.5--0.9 mm; sides without basal tubercles; embryo with 1 full spiral. 2n = 52.
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Diagnostic Description

Synonym

Potamogeton alpinus subsp. tenuifolius (Rafinesque) Hultén; P. alpinus var. subellipticus (Fernald) Ogden; P. alpinus var. tenuifolius (Rafinesque) Ogden; P. tenuifolius Rafinesque; P. tenuifolius var. subellipticus Fernald
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The species typically occurs in neutral to mildly acidic water on deep silt in lakes, rivers, canals and ditches.

Systems
  • Terrestrial
  • Freshwater
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Ponds, lakes, and slow-moving streams; 400--2500m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering early summer--fall.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Potamogeton alpinus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 11
Specimens with Barcodes: 14
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: N5 - Secure

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2011

Assessor/s
Allen, D.

Reviewer/s
Lansdown, R.V. & Smith, K.

Contributor/s

Justification
This species is classed as Least Concern as it is widespread with stable populations and does not face any major threats.
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Population

Population
There is little detailed information available on trends in populations of the species in Europe, there has been a decline in the UK (Preston et al. 2002) but this appears to have mainly occurred in the 19th century. There is some evidence of a decline elsewhere, but this is mainly linked to the degradation and loss of wetland habitats.

Population Trend
Stable
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Threats

Major Threats

There are no known past, ongoing, or future threats to the survival of this species.

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Management

Conservation Actions

Conservation Actions

There are no conservation measures in place or needed.

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Notes

Comments

Plants of Potamogeton alpinus often are red whenever taken from the water, a feature that makes this species quite distinctive. 

 Two varieties, Potamogeton alpinus var. tenuifolius and var. subellipticus, have been recognized in North America, based mainly on submersed leaf shape. Plants bearing both leaf types have been observed in the same population; hence the varieties are not recognized.

Four hybrids, Potamogeton alpinus × P. nodosus (= P. subobtusus Hagström), P. alpinus × P. gramineus (= P. xnericius Hagström), P. alpinus × P. praelongus (= P. griffithii A. Bennett), and P. alpinus × P. perfoliatus (= P. prussicus Hagström), have been described.

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