Epiphytic herbs, subshrubs or shrubs; stems stout, subquadrangular, the inter-nodes somewhat verrucose, tomentose, the nodes swollen. Leaves often strongly unequal; blades elliptic, falcate, 6-20 cm long, 3-9 cm wide, membranous, the apex acute to acuminate, the base cuneate or decurrent, the margin shallowly dentate, above dark green, occasionally with paler veins, strigillose, below paler green, often reddish, pubescent; petioles often elongate, 0.5-4.0 cm long. In-florescences of few to several flowers congested in the upper leaf axils, the pedicels strigillose; calyx lobes pale pink to purplish, ovate, 1.5-2.5 cm long, ca. 1.5 cm wide at the base, serrate, sparsely strigose; corolla yellow, not much longer than the calyx, the tube slightly curved, broader toward the limb, sparsely pilose outside, the limb spreading, the lobes erose; ovary pilose. Capsule ovoid, surrounded by the persistent calyx, ca. 8 mm long, purplish, pubescent; seeds oblong, dark brown, longitudinally striate, embedded in black matrix.
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