Erect undershrub to 30 cm tall, glabrous except flowers. Leaves sessile, narrowly elliptic, tapering towards base, dentate; lamina 2-4 cm long, 5-15 mm wide. Flowers in short racemes to 10 cm long; bracts leaf-like; peduncle to 5 mm long; bracteoles linear-lanceolate, c. 5 mm long; pedicel 9-12 mm long, articulate. Sepals lanceolate, 7-8 mm long. Corolla c. 22 mm long, villous inside, with enations, scarcely auriculate; abaxial lobes 6-8 mm long; wings 1-1.5 mm wide. Indusium broadly oblong. Ovules c. 20. Fruit ovoid-obloid, 12 mm long; valves bifid. Seeds elliptic, 3 mm long, yellowish, minutely reticulate.