Spirodela punctata
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
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"
absent +
pointed +
small green +
absent +
pigment +
absent +
triangular +
triangular +
bisexual +
coherent +
floating +
1.5-2 +
arising +
small +
membranous +
not differentiated +
winged +
Present +
true +
branching +
1-2-ovulate +
membranous +
absent +
Rep. (Annual) Missouri Bot. Gard. +
1898 +
lateral +
distinct +
10;15 +
absent +
absent +
2;7 +
membranous +
ribbed +
1;3 +
absent +
distinct +
absent +
funnel--shaped +
Spirodela punctata +
Spirodela +
species +
brownish olive +
distinct +
absent +
circular-reniform +
smaller +
small +
absent +
perennial +
reduced +