Fls small, solitary, axillary, 5-merous; calyx cut to base into subequal sepals; corolla deeply lobed, broadly campanulate, lobes induplicate. Staminal filaments filiform, anthers included. Ovary of 2 distinct 1-2-ovuled carpels; styles basal. Capsule membr., us. 1-seeded, opening irregularly. Small creeping perennial herbs, rooting at nodes, with entire lvs. A widespread genus of warm regions, with some 10 spp.

Small, creeping, glabrous or hairy perennial herbs; stems rooting at nodes. Latex 0. Lvs entire or nearly so; petioles usually long and slender. Fls solitary, axillary, small and inconspicuous; bracts minute. Sepals 5, subequal, accrescent. Corolla campanulate, deeply 5-lobed, greenish or yellowish; lobes valvate with infolded margins. Stamens included. Ovary of 2 distinct carpels, each with (1)-2 ovules. Styles 2, filiform, inserted between carpels. Capsule membranous, usually 1-seeded, 2-lobed, indehiscent or dehiscing irregularly. Seeds smooth and glabrous.