Description from Flora of China
Lepidostemon Hasskarl; Nemodon Griffith.
Herbs or woody twiners, usually pubescent. Leaves petiolate, ovate to circular, herbaceous, base cordate, margin entire or 3-5-lobed. Inflorescences axillary, dense, sessile or short-peduncled, ± umbellate cymes; bracts early deciduous, small. Sepals subequal, herbaceous or ± leathery, pubescent or glabrous, apex acute or obtuse. Corolla urceolate; limb shallowly 5-lobed, midpetaline bands pubescent outside. Stamens included; filaments inserted near base of corolla, dilated basally into a large concave scale that arches over ovary; anthers narrowly elliptic to linear; pollen globular, pantoporate, finely spiny. Disc cupular and ± 5-lobed or ringlike. Pistil included; ovary glabrous or pubescent, 2-loculed; ovules 2 per locule. Style 1, very short; stigmas 2, capitate. Capsule globose, 4-valved. Seeds 4 or less, glabrous or puberulent.
About ten species: Africa, Asia, Australia; two species in China.