Subshrub with stems to c. 2 m high, i.e. flowering stems. Leaves purple and green above, the latter especially towards margins, uniformly purple beneath, strongly rugose, scarcely aromatic. Flowers bicoloured. Corolla c. 1.2 cm long; tube c. 7 mm long, white, proximal 2 mm narrow, then bent at right angles and ampliate; lobes of upper lip whitish or pale mauve and strongly reflexed; lower lip c. 5 mm long, boat-shaped, deep blue. pointing outwards.