Erect shrub to 1 m tall, glabrous. Leaves cauline, dense, ascending, ±obscuring stem, ±stem-clasping, decurrent, elliptic to ovate, dentate; lamina 10-35 mm long, 8-12 mm wide. Flowers in compact thyrses to 10 cm long; bracts linear, to 5 cm long; peduncle to 10 cm long; bracteoles linear-lanceolate, c. 7 mm long; pedicel 1-2 mm long. Sepals linear, 9 mm long, acute, entire, sometimes slightly viscid. Corolla 15-18 mm long lobes ±equal, c. 8 mm long; wings c. 2 mm wide. Ovary with septum almost to top; ovules 30-40; style with simple and glandular hairs. Fruit a cylindrical capsule, 9 mm long. Seeds elliptic, c. 1 mm long.