| + | Perennial aquatic herbs, stoloniferous, with lanceolate or ovate, petiolate, emersed lvs.: fls. perfect; sepals 3, persistent; petals 3, thin, fugacious; stamens numerous, the outer ones sterile: carpels 15-20, verticillate, style none, stigma sessile and extrorse.—Two species are admitted by Buchenau, (Engler's Pflanzenreich, hft. 16. 1903), both tropical American. From Hydrocleis it differs in its more numerous verticillate carpels, no style and different stigmas. |