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4. Lemna minor L., Sp. Pl. 970. 1753. Boiss., Fl. Or. 5: 29. 1884; Hook. f., Fl. Brit. Ind. 6:556. 1894; den Hartog & van der Plas in Blumea 18: 362. 1970; Stewart, l.c.; Landolt in Aquatic Bot. 1:355. 1975; Riedl in Rech. f., Fl. Iran 119: 5. 1976; Landolt, l.c. 18. 1980; Uotila, l.c. 66.
RIZWAN Y. HASHMI & SAOOD OMER
Fronds free floating, almost symmetrical, elliptical to ovate-obovate or oblong, 1.5-4 x 1.5-3 mm, flat on both surfaces, never gibbous and ± rounded apices, usually green above, solitary or several joined together by a hyaline stipe. Papillae absent or if present only at apex and above node with many meshes. Roots solitary with a wingless sheath, root cap obtuse, floral pocket lateral. Flowering specimens not seen.
Type: Described from Europe, Hb. Linn. 1093/2 (LINN).
Distribution: Temperate Eurasia, India, Iran, Pakistan Afghanistan, Africa, North America and New Zealand.
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