Alisma triviale

Pursh

Flora Americae Septentrionalis 1: 252. 1814.

Common names: Northern water-plantain alisma commun
Illustrated
Synonyms: Alisma plantago-aquatica var. americanum Schultes & Schultes f.
Treatment appears in FNA Volume 22.

Herbs, to 1 m. Leaves emersed, petiolate; blade linear-lanceolate to broadly elliptic or oval, to 35 × 3–12 cm. Inflorescences to 1 m. Flowers chasmogamous; sepals 3–6 mm; petals white, 3.5–6 mm, margins ± erose, apex obtuse; anthers ovoid, 0.6–1 mm; style ± curved, 0.4–0.6 mm, equal to ovary length. Fruiting heads 4.1–7 mm diam; achenes ovoid, 2.1–3 mm, abaxial keel broadly rounded with 1 median abaxial groove, beak erect or nearly erect. 2n = 28.


Phenology: Flowering spring–fall.
Habitat: Shallow muddy ponds, stream margins, marshes, and ditches
Elevation: 0–2000 m

Distribution

V22 535-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Utah, Vt., Wash., Wis., Wyo., n Mexico.

Discussion

I have seen no specimens from West Virginia, but although the species is to be expected there.

Selected References

None.

Lower Taxa

None.
... more about "Alisma triviale"
Robert R. Haynes +  and C. Barre Hellquist +
Northern water-plantain +  and alisma commun +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +, Wyo. +  and n Mexico. +
0–2000 m +
Shallow muddy ponds, stream margins, marshes, and ditches +
Flowering spring–fall. +
Flora Americae Septentrionalis +
Illustrated +
Alisma plantago-aquatica var. americanum +
Alisma triviale +
species +