Difference between revisions of "Lemna gibba"
Sp. Pl. 2: 970. 1753.
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|publication year=1753 | |publication year=1753 | ||
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| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V22/V22_534.xml |
|genus=Lemna | |genus=Lemna | ||
|species=Lemna gibba | |species=Lemna gibba | ||
Latest revision as of 20:31, 5 November 2020
Roots to 15 cm, tip mostly rounded; sheath not winged. Stipes white, thin, often decaying. Fronds floating, 1 or 2–5 or more, coherent in groups, obovate, often gibbous, 1–8 mm, 1–1.5 times as long as wide, margins entire; veins (3–)4–5(–7) (all originating from node), greatest distance between lateral veins near or distal to middle; papillae often indistinct; upper lower surface sometimes red colored, coloring beginning from margin, lower upper surface occasionally with distinct red spots beginning from margins near apex; largest air spaces longer than 0.3 mm; distinct turions absent. Flowers: ovaries (1–)2–7-ovulate, utricular scale with narrow opening at apex. Fruits 0.6–1 mm, laterally winged. Seeds with 8–16 distinct ribs, falling out of fruit wall after ripening. 2n = 40, 42, 44, 50.
Phenology: Flowering (rather frequent) spring–fall.
Habitat: Eutrophic, quiet waters in temperate regions with mild winters
Elevation: 0–1900 m
Distribution
Ariz., Calif., Ill., Nebr., Nev., N.Mex., Tex., Wyo., northern Mexico, South America, Eurasia, Africa, Atlantic Islands.
Discussion
Selected References
None.