Viscid herb. Stem erect, hispid, hairs upward directed. Leaves elliptic to linear, acute, 1-3 x 0.1-0.5 cm, obtuse, hispid on both surfaces, viscid. Flowers solitary axillary, opposite or alternate. Calyx c. 5 mm, densely hispid. Corolla 12-20 mm, deep pink to crimson, sparsely hairy. Capsule 4-6 mm. Seeds 5-7 mm long.