Potamogeton foliosus subsp. foliosus

Common names: Leafy pondweed potamot feuille
Synonyms: Potamogeton curtissii Rafinesque Potamogeton foliosus var. macellus Fernald
Treatment appears in FNA Volume 22.

Stems: glands rarely present, less than or equal to 0.3 mm diam. Leaves: stipules greenish to brown, delicate to slightly fibrous, veins decaying with age. Inflorescences: spikes continuous, rarely interrupted. Fruits olive-green to green-brown, 1.5–2.7 × 1.2–2.2 mm; keel greater than or equal to 0.2 mm high; beak 0.2–0.6 mm. 2n = 28.


Phenology: Flowering and fruiting spring–fall.
Habitat: Wide variety of waters of lakes and streams, either slow- or rapidly flowing
Elevation: 0–2300 m

Distribution

V22 603-distribution-map.jpg

Alta., B.C., Man., N.B., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Mexico, West Indies, Central America (Guatemala, Costa Rica).

Discussion

Potamogeton foliosus subsp. foliosus is probably the most common linear-leaved species of the family in North America, and it is probably the easiest to determine. Any linear-leaved Potamogeton specimen with fruits having an undulating winglike abaxial keel most likely is this taxon.

Selected References

None.

Lower Taxa

None.
Robert R. Haynes +  and C. Barre Hellquist +
Rafinesque +
Leafy pondweed +  and potamot feuille +
Alta. +, B.C. +, Man. +, N.B. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Wyo. +, Mexico +, West Indies +, Central America (Guatemala +  and Costa Rica). +
0–2300 m +
Wide variety of waters of lakes and streams, either slow- or rapidly flowing +
Flowering and fruiting spring–fall. +
Medical Repository +
Weedy +  and Illustrated +
Potamogeton curtissii +  and Potamogeton foliosus var. macellus +
Potamogeton foliosus subsp. foliosus +
Potamogeton foliosus +
subspecies +