Soleirolia Gaudich.
Perennial, monoecious herb, without stinging hairs. Lvs alternate, entire, exstipulate. Fls inconspicuous, solitary, axillary, bracteolate. Perianth green, 4-partite; segments ± equal; segments of ♂ fls connate at base. Achene enclosed by perianth and bracteoles.
1 sp., W. Mediterranean Is. Naturalised sp. 1.