Northern Water Plantain

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

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.

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.

Flowering spring--fall.

Shallow muddy ponds, stream margins, marshes, and ditches; 0--2000m.

Alisma plantago-aquatica Linnaeus var. americanum Schultes & Schultes f.

Alisma brevipes Greene, Pittonia 4 : 158. 1900
Alisma superbum Ivunell, Bull. Leeds Herb. 2 : 5. 1908.
Plants similar to those of A. subcordatum in habit, but commonly larger ; leaf -blades oblong or oblong-lanceolate to ovate, 5-19 cm. long, acute, sometimes abruptly pointed at the apex, rounded, truncate or subcordate at the base or sometimes gradually narrowed to the petiole, which commonly exceeds the blade in length ; scapes 1 m. tall or less, the branches and pedicels very numerous, except in small plants ; bracts lanceolate or linearlanceolate ; sepals suborbicular or orbicular-ovate, mostly over 3 mm. long ; petals white, 5-6 mm. long ; achene-heads 5-6.5 mm. broad, the achenes obovate, 2.5-3 mm. long, the beak ascending.
Type locality : Piedra, Colorado.
Distribution : Nova Scotia to British Columbia, North Dakota, and California.

Alisma triviale, the northern water plantain, is a perennial semi-aquatic or aquatic plant in the water-plantain family (Alismataceae).