Erect shrub, 0.5-0.6 m high, densely branched. Leaves 3-nate, appressed, imbricate, including petioles 1.5-2.1 x 0.7 mm, oblong or oblong-ovate, obtuse, adaxially flat, minutely ciliate. Flowers in small, terminal clusters of 3-9, drooping. Calyx: sepals 4, unequal, narrowly oblong, obtuse, minutely ciliolate, larger 1.4-2.1 mm long, leaf-like in upper half. Corolla obconic-clavate, 4-lobed, glabrous, pink; tube 1.5-1.6 mm long; lobes incurved, 0.5 mm long, rounded. Stamens 4, included; filaments 1.4 mm long, free, filiform; anthers ± 0.7 mm long, broadly cuneate, bifid to halfway down, basal appendages awn-like, minutely scabrid. Ovary subglobose, slightly 4-grooved, puberulous; style just reaching apex of corolla lobes, ± 0.7 mm long, glabrous; stigma peltate, 0.5 mm in diam. Flowering time Oct.-Dec.