Epiphytic herb, 0.5-1 m tall. Stem slightly fleshy, ascending, villous. Leaves subequal in a pair; petiole 1-4 cm long, villous; blade chartaceous when dry, elliptic or oblong-elliptic, 13-23 x 4-6 cm, margin serrate, apex slightly acute, base cuneate to decurrent, above villous, below villous. Flowers numerous, fasciculate; pedunculate; pedicel 0.4-1 cm long, villous. Calyx cream-white to yellow, lobes free, erect, subequal, oblong, 2-4 x 0.2-0.5 cm, margin entire to wavy, apex acute to obtuse, outside villous, inside appressed-pubescent; corolla slightly oblique in calyx, greenish white to yellow, 2-2.5 cm long, tube funnelform, 1.5-2 cm long, base shortly spurred, 0.3-0.4 cm wide, middle cylindric, throat 0.8-1 cm wide, outside appressed-pubescent, inside glabrous except ventrally, limb 1.5-1.8 cm wide, lobes subequal, spreading, suborbicular, 0.3-0.6 x 0.6-0.9 cm, margin entire; stamens included; ovary ovoid, 0.4 cm long, 0.25 cm wide, densely hairy, style 1.0-1.2 cm long, stigma stomatomorphic. Mature capsule yellowish, ovoid, laterally compressed, 0.7 x 0.8 cm.
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