Wolffia columbiana

H. Karsten
Botanische Untersuchungen. [Landwirthschaftliche Lehranstalt. Physiologisches Laboratorium] Berlin 1: 103, figs. 2g, 3g. 1865.
Common names: Wolffie de Colombie
WeedyIllustrated
Treatment appears in FNA Volume 22. Treatment on page 153.

Fronds nearly globular, 0.5–1.4 mm (x 0.4–1.2 mm), 1–1.3 times as long as wide, 1–1.3 times as deep as wide, rounded at apex, papilla absent; upper surface transparently green, with 1–10(–30) stomates; pigment cells absent in vegetative tissue. 2n = 30 (H, U), 40 (U), 42 (D), 500 (U), 70 (70), 80 (U).


Phenology: Flowering (very rare) summer–early fall.
Habitat: Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions
Elevation: 0–1100 m

Distribution

V22 314-distribution-map.jpg

Alta., Man., Ont., Que., Sask., Ala., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., S.C., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis., Mexico, West Indies (Cura�ao), Central America, South America.

Discussion

I know of no specimens of Wolffia columbiana from Rhode Island.

Lower Taxa

None.

... more about "Wolffia columbiana"
Elias Landolt +
H. Karsten +
Wolffie de Colombie +
Alta. +, Man. +, Ont. +, Que. +, Sask. +, Ala. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Vt. +, Va. +, W.Va. +, Wis. +, Mexico +, West Indies (Cura�ao) +, Central America +  and South America. +
0–1100 m +
Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions +
Flowering (very rare) summer–early fall. +
Botanische Untersuchungen. [Landwirthschaftliche Lehranstalt. Physiologisches Laboratorium] Berlin +
brooks1940a +, dore1957a +  and landolt1980a +
Weedy +  and Illustrated +
Wolffia columbiana +
species +