Caucanthus Forssk.

Woody climbers or upright or semi-scandent shrubs; stems with younger parts usually ± densely appressed pubescent or sericeous. Leaves spirally arranged or opposite, with 2 glands on margin near base or eglandular; stipules very small, deciduous. Inflorescences racemose or corymbose-paniculate, axillary or terminal. Flowers actinomorphic. Sepals without glands. Petals clawed (sometimes very shortly), sometimes auriculate or hastate at base, glabrous, margins wholly or partially fimbriate. Stamens glabrous with dorsifixed anthers. Ovary densely sericeous; styles truncate, shorter than to slightly exceeding stamens. Fruit with a lateral wing completely surrounding the nut, circular or broadly elliptic; dorsal wing small, obliquely lanceolate or absent.