Description from Flora of China
Petiole to 14.5 cm, densely pale brown villous or woolly; leaf blade ovate-elliptic to broadly ovate, 6-12 X 4.5-6.5 cm, adaxially gray to brown pubescent or pubescent and villous, abaxially sparsely to densely gray or gray-brown pubescent, brown villous along veins, base often oblique, cuneate to subrounded or cordate, margin serrulate or crenate-serrate, apex acute to rounded; lateral veins 5-7 on each side of midrib, distinct. Cymes 1-8-flowered; peduncle 10-17 cm, pale brown villous; bracts 2, linear to narrowly triangular, 2-3 X 0.5-1 mm, densely villous, margin entire. Pedicel 1-1.8 cm. Calyx segments narrowly lanceolate, 3-6 mm, margin entire. Corolla orange-red, 1.6-2.4 cm, outside pubescent; tube campanulate, 0.9-2 cm X 6-7 mm; limb barely 2-lipped; adaxial lip shallowly 2-lobed, lobes 3-5(-7) X 4-5(-8) mm; abaxial lip lobes 7-8 X 5-6 mm. Stamens adnate to corolla 4-6 mm above base, ca. 1.2 cm; filaments slender, pubescent; anthers broadly oblong, 2-loculed, dehiscing longitudinally, connective glabrous; staminode apparently absent. Disc ca. 1 mm, entire. Pistil 1.2-1.3 cm, glabrous. Stigmas 2, equal, suborbicular. Capsule 3.5-4 cm. Fl. Feb, Oct, fr. Oct.