Description from Flora of China
Bryophthalmum E. Meyer; Odostima Rafinesque.
Herbs perennial, small, glabrous, stoloniferous. Leaves radical, petiolate, leathery, serrulate. Flower solitary, terminal on long stalk. Sepals 5, deeply lobed, persistent. Petals spreading, white or pink, orbicular. Stamens (8–)10; filaments subulate, base glabrous; anthers with tubes, opening by 2 apical pores; disk obscure. Ovary globose or subglobose; ovules on thickened placentas on inner angles of loculi; style straight, apex clavate; stigma 5-toothed. Seeds small, testa elongated at both ends. n = 13.
One or two species: Asia, Europe, North America; one species in China.
(Authors: Qin Haining (覃海宁); Peter F. Stevens)