Perennial herb. Radical to lower cauline lvs with sparsely hairy petiole to c. 30 cm long; lamina to c. 21 × 18 cm, broadly ovate, with coarse, ± appressed hairs on both surfaces, entire; base cordate with deep rounded sinus; apex rounded or obtuse. Upper cauline lvs similar but petiole short; lamina 3-4 × 2-2.5 cm. Infl. to c. 50 cm long; branches clothed in appressed hairs. Calyx 1.5-2 mm long, clothed in appressed hairs or nearly glabrous; lobes lanceolate, obtuse, strongly ciliate. Corolla tube c. 1 mm long, white; limb 6 × 9 mm diam., bright blue above, pale beneath; lobes obovate; scales white, grooved down centre, nearly closing corolla throat. Anthers dark. Nutlets glabrous, not seen at maturity.