Wolffia brasiliensis

Weddell
Annales des Sciences Naturelles, Botanique sér. 3, 12: 170. 1849.
WeedyIllustrated
Synonyms: Wolffia papulifera C. H. Thompson Wolffia punctata Grisebach
Treatment appears in FNA Volume 22. Treatment on page 152.

Fronds boat-shaped, 0.5–1.6 mm, 1–1.5 times as long as wide, 0.3–0.7 times as deep as wide, rounded at apex, papilla usually prominent in center of upper surface (tent-shaped); upper surface intensely green, with 50–100 stomates; pigment cells present in vegetative tissue (visible in dead fronds as brown dots). 2n = 20, 40, 42, 50, 60, 80.


Phenology: Flowering (rare) late spring–early fall.
Habitat: Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions
Elevation: 0–1000 m

Distribution

V22 541-distribution-map.jpg

Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Va., Wash., W.Va., Wis., Mexico, West Indies, Central America, South America.

Discussion

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

Selected References

None.

Lower Taxa

None.

... more about "Wolffia brasiliensis"
Elias Landolt +
Weddell +
Ala. +, Ark. +, Calif. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, Wash. +, W.Va. +, Wis. +, Mexico +, West Indies +, Central America +  and South America. +
0–1000 m +
Mesotrophic to eutrophic, quiet waters in temperate to subtropical regions +
Flowering (rare) late spring–early fall. +
Annales des Sciences Naturelles, Botanique +
Weedy +  and Illustrated +
Wolffia papulifera +  and Wolffia punctata +
Wolffia brasiliensis +
species +