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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B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Sask.; Ala., Ark., Calif., Conn., Ga., Idaho, Ill., Ind., Iowa, Kans., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Tenn., Vt., Va., Wash., W.Va., Wis., Wyo.
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Physical Description

Morphology

Description

Rhizomes present. Cauline stems terete, often rusty spotted, 6--110 cm; nodal glands absent. Turions absent. Leaves both submersed and floating or floating absent, ± spirally arranged. Submersed leaves petiolate, lax; stipules persistent, conspicuous, convolute, free from blade, light brown, not ligulate, 1.5--11.7 cm, not fibrous, not shredding at tip, apex acute; petioles terete, 0.9--11.5 cm; blade light to dark green, ovate to oblanceolate, distinctly arcuate, 5--12.5 cm ´ 15--58 mm, base rounded to acute, without basal lobes, not clasping, margins entire, crispate, apex not hoodlike, acute to round-apiculate, lacunae absent; veins 19--49. Floating leaves: petioles continuous in color to apex, 2.3--22.6 cm; blade adaxially light green, lanceolate to round elliptic, 4.3--9.2 cm ´ 25--38 mcm, base rounded to cordate, apex acute to rounded; veins 27--49. Inflorescences unbranched, emersed; peduncles not dimorphic, terminal or axillary, erect, cylindric, 4.5--22.3 cm; spikes not dimorphic, cylindric, 34--65 mm. Fruits sessile, reddish brown, obovoid, turgid, abaxially keeled, laterally ridged, 5--6.7 ´ 4.5--5.2 mm, lateral ridges without points; beak erect, 0.5--0.8 mm; sides without basal tubercles; embryo with full spiral. 2n = 52.
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Ecology

Habitat

Waters of lakes, ponds, streams, and rivers; 0--1900(--2900)m.
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Life History and Behavior

Cyclicity

Flowering/Fruiting

Flowering summer--fall.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Potamogeton amplifolius

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Potamogeton amplifolius

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 2
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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Threats

Comments: Somewhat threatened by land-use conversion and habitat fragmentation (Southern Appalachian Species Viability Project 2002).

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Notes

Comments

No specimens have been seen from Kentucky or Texas, but the species is to be expected there. 

 Potamogeton amplifolius is common throughout much of North America. Its submersed leaves are larger than those of most other species of Potamogeton, are arcuate, and have more veins than do any other species.

One hybrid, Potamogeton amplifolius ´ P. illinoensis (= P. ´ scoliophyllus Hagström), has been described.

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