Lemna aequinoctialis

Welwitsch

Bol. Ann. Cons. Ultramar. (Portugal) 55: 578. 1859

WeedyIllustrated
Synonyms: Lemna paucicostata Hegelmaier
Treatment appears in FNA Volume 22. Treatment on page 149.

Roots to 3 cm; tip usually sharp pointed; sheath winged at base (wing 1–2.5 times as long as wide). Stipes small, white, often decaying. Fronds floating, 1 or 2–few, coherent in groups, ovate-lanceolate, flat, 1–6 mm, 1–3 times as long as wide, margins entire; veins 3, greatest distance between lateral veins near or proximal to middle; 1 often very distinct papilla near apex on upper surface and 1 above node; anthocyanin absent, no reddish color; largest air spaces much shorter than 0.3 mm; distinct turions absent. Flowers: ovaries 1-ovulate, utricular scale open on 1 side. Fruits 0.5–0.8 mm, not winged. Seeds with 8–26 distinct ribs, falling out of fruit wall after ripening. 2n = 40, 42, 50, 60, 80, 84.


Phenology: Flowering (frequent) spring–fall.
Habitat: Mesotrophic to eutrophic, quiet waters in warm-temperate to tropical regions
Elevation: 0–1300 mm

Distribution

V22 544-distribution-map.jpg

Ala., Ariz., Ark., Calif., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.Mex., N.C., Okla., S.C., Tenn., Tex., Va., Wis., West Indies, Central America, South America, s Eurasia, Africa, Atlantic Islands, Indian Ocean Islands, Pacific Islands, Australia.

Discussion

Some authors did not distinguish between Lemna aequinoctialis and L. perpusilla and used the latter name for both species.

Selected References

None.

Lower Taxa

None.

... more about "Lemna aequinoctialis"
Elias Landolt +
Welwitsch +
Ala. +, Ariz. +, Ark. +, Calif. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Nebr. +, N.Mex. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +, Wis. +, West Indies +, Central America +, South America +, s Eurasia +, Africa +, Atlantic Islands +, Indian Ocean Islands +, Pacific Islands +  and Australia. +
0–1300 mm +
Mesotrophic to eutrophic, quiet waters in warm-temperate to tropical regions +
Flowering (frequent) spring–fall. +
Bol. Ann. Cons. Ultramar. (Portugal) +
Weedy +  and Illustrated +
Lemna paucicostata +
Lemna aequinoctialis +
species +