Alisma triviale

Pursh

Flora Americae Septentrionalis1: 252. 1814

Common names: Northern water-plantain alisma commun
Synonyms: Alisma plantago-aquatica americanum
Found 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

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.

References

None.

Facts about "Alisma triviale"
AuthorRobert R. Haynes + and C. Barre Hellquist +
Common nameNorthern water-plantain + and alisma commun +
Elevation0–2000 m +
HabitatShallow muddy ponds, stream margins, marshes, and ditches +
IllustratorJohn Myers +
PhenologyFlowering spring–fall. +
ReferenceNone +
SynonymAlisma plantago-aquatica americanum +
Taxon nameAlisma triviale +
Taxon parentAlisma +
Taxon rankspecies +
VolumeVolume 22 +