Erect herb, up to 1 m tall, young branches puberulous. Leaves opposite, petiole 1-2 cm long; lamina 5-16x 1-4 cm, lanceolate to linear-lanceolate, tapering at both ends, glabrous or glabrate. Cymes terminal as well as axillary. Pedicels 1-2 cm long, puberulent. Calyx hidden by the reflexed petals, green, lobes 2-3 mm long. Corolla red to orange red, lobes ovate to oblong, 4-7 (-10) mm long, corona segments erect, broadly ovate, obtuse, 4-5 mm long. Follicles 5.5-10 x 7-10 mm, tapering at both ends. Seeds c. 6 mm long, narrowly winged, dark brown, coma white silky.