Hydrocleys Rich.
Glabrous, lactiferous aquatic herbs. Stems rooting at nodes. Leaves floating. Flowers solitary, occasionally crowded; sepals 3, persistent; petals 3, delicate yellow, deciduous. Stamens many, outer staminodia. Carpels 3-6-(8), ± connate at base; style short. Follicles free, membranous. Spp. 4, of tropical S. America. Adventive sp. 1.
