Alisma triviale Pursh  
Family: Alismataceae
northern water plantain,  more...
[Alisma brevipes Greene,  more]
Alisma triviale image
Max Licher  
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. Flowering spring--fall. Shallow muddy ponds, stream margins, marshes, and ditches; 0--2000 m; 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. I have seen no specimens from West Virginia, but although the species is to be expected there.

Alisma triviale image
Max Licher  
Alisma triviale image
Max Licher  
Alisma triviale image
Max Licher  
Alisma triviale image
Max Licher  
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