Leaves opposite, entire; petioles 6-18 mm long; blades 3.5-9.5 cm long x (8)10-20 mm wide, elliptic-oblong to elliptic-lanceolate or linear-oblong, margins undulate.
Inflorescences racemes, condensed, 2-7-flowered. Bracts linear, 1.5-2 mm long, stellate pubescent; bracteoles 2, similar, about 1.5 mm long. Pedicels 13-14 mm long.
Flowers large, yellow to orange or orange-red; calyx campanulate, 12-13 mm long, unequally 5-lobed, lobes obtuse-apiculate, minutely and sparsely glandular-pubescent. Corolla tube broadly funnel-shaped, dilated at base; lobes sub-orbicular, 2.0-2.5 cm long, 28-32 mm wide. Filaments of longer stamens 37-38 mm long; staminode 16-17 mm long. Disk cupular-compressed, 5-lobed. Ovary broadly linear, about 4.5 mm long; style about 40 mm long; stigmas 2-lobed, oblong-ovate, compressed, 4.5-5 mm long.
Capsules 17-34 cmlong x 0.9-1.2 cm wide, linear-oblong, laterally compressed, slightly curved, apex beaked with wing, 20 mm broad.