Shrubs or trees with irritant hairs, dioecious or monoecious. Leaves alternate, simple, coriaceous, crenulate, undulate to smooth, petiolate; stipules entirely connate, intrapetiolar, coriaceous. Inflorescence axillary, pedunculate, racemose, bracteate. Flowers free, in small fascicles or on flabellate receptacles. Male flowers: tepals 4, rarely 5; stamens 4, rarely 5; pistillode present. Female flowers sessile to pedicellate, flabellately or distichously arranged, or in loose fascicles; tepals 4; ovary ovoid, unilocular; stigmas usually ligulate; ovule erect; staminodes absent; pedicels simple or swollen. Achenes compressed or ellipsoidal to ovoid, not chartaceous, usually strongly warty.