Much-branched shrub to c. 2 m high, with slender puberulent stems. Lvs opposite or alternate, sessile or subsessile, 5.5-12 × 0.5-1 cm, linear-lanceolate, glabrous except for midrib beneath and sometimes scattered hairs above and on margins, sharply acute. Cymes axillary; fls few to fairly numerous. Peduncles and pedicels usually 1-2 cm long, densely puberulent. Calyx lobes 3.5-4 mm long, linear-lanceolate, densely puberulent. Corolla lobes 6-9 mm long, ovate-elliptic; margins white, ciliate towards apex at least on one side. Corona scales c. 4 mm long, fleshy, hooded, greenish white, incurved, with a lateral tooth or auricle on each side. Follicles 4-6 cm long, broad-ovoid, tapering to a beak, inflated, ± puberulent, covered with soft, subulate bristles 7-10 mm long.