Slender shrub to 1.5 m tall, almost glabrous. Leaves elliptic to narrowly elliptic, serrate or dentate; lamina 2-5 cm long, 8-25 mm wide. Inflorescence with pedicels to 15 mm long; bracteoles at middle. Sepals linear to lanceolate, 7-8 mm long, adnate to ovary for more than 1/2 its length. Corolla 15-20 mm long, stellate-pubescent outside, mauve; lobes unequal; wings to 2 mm wide; adaxial lobes with bristles near posterior margin only. Ovules 2, almost basal. Capsule cylindrical, c. 10 mm long, valves entire or bifid. Seeds obloid, 5 mm long.