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"
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Robert R. Haynes +  and C. Barre Hellquist +
attenuate;rounded +
0 cm0 mm <br />0 m <br /> (35 cm350 mm <br />0.35 m <br />) +
linear-lanceolate +  and broadly elliptic or oval +
3cm +  and 12cm +
lanceolate +
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 +
u--shaped +
subsessile +  and long-pedicellate +
hypogynous +
compressed +
Shallow muddy ponds, stream margins, marshes, and ditches +
decumbent +  and floating +
0 cm0 mm <br />0 m <br /> (100 cm1,000 mm <br />1 m <br />) +
submersed +  and emersed +
decumbent +  and floating +
deciduous +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
triangular +
Flowering spring–fall. +
not radiating +
Flora Americae Septentrionalis +
decumbent +  and floating +
not septate +
persistent +
not sculptured +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Illustrated +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Alisma plantago-aquatica var. americanum +
Alisma triviale +
species +
emersed +  and submersed +
bracteolate +  and branching +