Spirodela punctata
Rep. (Annual) Missouri Bot. Gard. 9:28. 1898.
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.
Revision as of 21:57, 16 December 2019 by FNA>Volume Importer
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
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.