Description from Flora of China
Small trees or shrubs, monoecious; indumentum of simple hairs. Leaves alternate or subwhorled; stipules small; deciduous leaf blade entire, pinnately veined. Inflorescences axillary, unisexual, male unbranched. Male flowers: calyx 3-lobed, valvate; petals absent; disk absent; stamens many; filaments united into phalanges; anthers 2-locular, subglobose, divaricate, connective arching; pistillode absent. Female flowers solitary, long pedicelled; sepals 5-7, unequal, imbricate, persistent; ovary 3-locular, muricate; styles 3, filiform, base connate, papillose. Capsule 3-locular, muricate or with dense, rigid bristles. Seeds subglobose.
Three species: disjunct distribution in China, E India, Malaysia, and N Vietnam; one species in China.
(Authors: Qiu Huaxing (丘华兴 Chiu Hua-hsing, Kiu Hua-shing, Kiu Hua-xing); Michael G. Gilbert)