Spirodela punctata

(G. Meyer) C. H. Thompson
Rep. (Annual) Missouri Bot. Gard. 9:28. 1898.
WeedyIntroducedIllustrated
Basionym: Lemna punctata G. Meyer Prim. Fl. Esseq., 262. 1818
Synonyms: Spirodela oligorrhiza (Kurz) Hegelmaier
Treatment appears in FNA Volume 22. Treatment on page 145.

Roots (1–)2–7(–12), to 7 cm, all perforating scale. Fronds obovate, flat or gibbous, 1.5–8 mm, 1.5–2 times as long as wide, apex mostly pointed, upper surface without red spot; veins (3–)5–7; distinct turions absent. Flowers: ovaries 1–2-ovulate. Fruits 0.8–1 mm, laterally winged to apex. Seeds with 10–15 distinct ribs. 2n = 40, 46, 50


Phenology: Flowering (rare) summer�early fall.
Habitat: Eutrophic, quiet waters, in warm-temperate to subtropical regions with mild winters
Elevation: 0–900 m

Distribution

V22 162-distribution-map.jpg

Introduced; Ala., Ariz., Ark., Calif., D.C., Fla., Ga., Ill., Ky., La., Miss., Mo., N.C., Okla., Oreg., Pa., S.C., Tenn., Tex., Va., Wash., South America, Asia, Africa, Atlantic Islands, Pacific Islands, Australia.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Spirodela punctata"
Elias Landolt +
(G. Meyer) C. H. Thompson +
Lemna punctata +
Ala. +, Ariz. +, Ark. +, Calif. +, D.C. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +, Wash. +, South America +, Asia +, Africa +, Atlantic Islands +, Pacific Islands +  and Australia. +
0–900 m +
Eutrophic, quiet waters, in warm-temperate to subtropical regions with mild winters +
Flowering (rare) summer�early fall. +
Rep. (Annual) Missouri Bot. Gard. +
Weedy +, Introduced +  and Illustrated +
Spirodela oligorrhiza +
Spirodela punctata +
Spirodela +
species +