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1. Spirodela Schleid. in Linnaea. 13: 391. 1839. Boiss., Fl. Or. 5: 30. 1884; Dumort in Komarov, Fl. U.R.S.S. 3: 390. 1935; Riedl in Rech. f., Fl. Iran. 119: 2. 1976; Landolt in Veroff. Geobot. Inst. ETH, 70: 13-17. 1980; Uotila in Davis, Fl. Turk. 8:64. 1984.
RIZWAN Y. HASHMI & SAOOD OMER
Floating herbs. Fronds asymmetrical with 3-15 nerves, discoid or reniform to obovate, in groups of 2-5, flat or distinctly inflated with a 2-lobed prophyllum at the base; raphides and druses present. Slit of the budding pouch lateral to the margin of the frond, remaining attached to the parent by a slender stipe. Roots 2-18, usually from the swollen portion beneath the fronds. Flowers rarely produced, enclosed in spathe; 2 male and 1 female flower in a lateral slit pouch; each male flower with 1 stamen; anthers 4-thecous; 1-4 ovules in pistillate flowers.
Cosmopolitan genus with 3 species mostly distributed in temperate and tropical zones; in Pakistan represented by 1 species.
Lower Taxon
Related Synonym(s):
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