Description from Flora of China
Shrubs, shrublets, or perennial herbs. Stems erect or spreading, rarely sublianous, branched, usually strigose. Leaf blade margin with incurved hairs. Inflorescences terminal or axillary, subcapitate to capitate, with 2 to many spikelets; spikelets usually 1-flowered; bracts herbaceous; bractlets 2, membranous. Calyx tubular, herbaceous along ribs, membranous between ribs except at base, usually split between ribs by fruiting time. Corolla salverform, extended beyond calyx; limb rotate; lobes obovate to obdeltate. Stamens hypogynous or becoming adnate to corolla base; anthers oblong-linear, slightly exserted. Ovary oblong-ovoid to ellipsoid, slightly 5-angular or 5-sulcate, apex conical. Style 1, apically 5-branched; stigma on inner side of style branches, covered with stalked or sessile capitate glands.
Eight species: E Africa, Asia; five species in China.