Xeromphis Raf.: 21 (1838).
Shrubs or small trees, usually with spines formed from modified lateral branchlets. Leaves usually clustered on short, opposite, axillary branchlets or cushion-like shoots; stipules short, ovate-acuminate or triangular, apiculate, deciduous. Flowers 1 or 2(3) together, terminating opposite pairs of abbreviated lateral shoots. Calyx 5-lobed, lobes short; tube ovoid or campanulate; limb-tube shortly cylindrical, ellipsoid or urceolate. Corolla white, densely pubescent outside except for base of tube; tube +/- campanulate, shorter than lobes, with a circular band of long hairs within. Stamens 5, arising on corolla tube or in mouth, exserted or included; filaments linear, shorter than anthers; anthers oblong or linear. Ovary 2-locular, placentae attached to septum; ovules many; style terete or thickened upwards, as long as tube or exserted; stigma ellipsoid or cylindrical, grooved or 2-lobed. Fruit 2-locular, globose, many-seeded, crowned by persistent calyx lobes. Seeds discoid or compressed-ellipsoid with slightly raised reticulation on testa.
Species +/- 6, tropical Africa to Asia; a subspecies, Catunaregam spinosa (Thunb.) Tirveng. subsp. spinosa, in Botswana, Northern Province, Mpumalanga, Swaziland and KwaZulu-Natal.