Alisma gramineum

Lejeune

Flore des Environs de Spa 1: 175. 1811.

Common names: Grass-leaved water-plantain alisma graminoide
Synonyms: Alisma geyeri Torrey Alisma gramineum var. angustissimum A. J. Hendricks Alisma gramineum var. wahlenbergii Raymond & Kucyniak
Treatment appears in FNA Volume 22.

Herbs, 0.5–30 (–50) cm. Leaves submersed, floating, or emersed; submersed sessile, ribbonlike; floating linear, 15–100 × 0.2–2 (–3) cm, blade present or absent; emersed petiolate, rarely sessile, blade linear-lanceolate, lanceolate, or narrowly elliptic, 4–2–6 × 1.5 cm. Inflorescences to 50 cm. Flowers cleistogamous in submersed plants, chasmogamous in terrestrial; sepals 1.5–3 mm; petals faint purplish white, 2–4 mm, margin entire to slightly erose, apex obtuse; anthers ovoid, 0.3–0.6 mm; style coiled, 0.4–0.5 mm, ½ length ovary. Fruiting heads 3–6 mm diam.; achenes orbicular to orbicular-ovoid, 2–2.7 mm, with 2 shallow, abaxial grooves lateral to 1 abaxial ridge, beak erect. 2n =14.


Phenology: Flowering summer–fall.
Habitat: Shallow fresh or brackish water or muddy shores
Elevation: 30–1800 m

Distribution

V22 109-distribution-map.jpg

Alta., B.C., Man., Ont., Que., Sask., Ariz., Calif., Colo., Idaho, Minn., Mont., Nebr., Nev., N.Y., N.Dak., Oreg., S.Dak., Utah, Vt., Wash., Wyo., Eurasia, n Africa

Discussion

Selected References

None.

Lower Taxa

None.

"-6cm" is not declared as a valid unit of measurement for this property.

... more about "Alisma gramineum"
orbicular;orbicular-ovoid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Robert R. Haynes +  and C. Barre Hellquist +
Lejeune +
attenuate;rounded +
elliptic +, lanceolate +  and linear-lanceolate +
lanceolate +
Grass-leaved water-plantain +  and alisma graminoide +
Alta. +, B.C. +, Man. +, Ont. +, Que. +, Sask. +, Ariz. +, Calif. +, Colo. +, Idaho +, Minn. +, Mont. +, Nebr. +, Nev. +, N.Y. +, N.Dak. +, Oreg. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wyo. +, Eurasia +  and n Africa +
30–1800 m +
u--shaped +
subsessile +  and long-pedicellate +
hypogynous +
chasmogamous +  and cleistogamous +
compressed +
Shallow fresh or brackish water or muddy shores +
decumbent +  and floating +
0 cm0 mm <br />0 m <br /> (50 cm500 mm <br />0.5 m <br />) +
submersed +  and emersed +
entire;slightly erose +
decumbent +  and floating +
deciduous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
triangular +
Flowering summer–fall. +
not radiating +
submersed +
Flore des Environs de Spa +
decumbent +  and floating +
not septate +
persistent +
not sculptured +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
Alisma geyeri +, Alisma gramineum var. angustissimum +  and Alisma gramineum var. wahlenbergii +
Alisma gramineum +
species +
sessile +  and petiolate +
emersed +  and submersed +
bracteolate +  and branching +