Epiphytic shrub; branchlets terete, glabrous or occasionally sparsely pu-berulous when young, brownish; root often swollen, tuberous. Leaf blades coriaceous, ovate, 8-12 cm long, 4-7 cm wide, glabrous to moderately puberulent beneath, basally strongly cordate or sometimes even amplexicaul, apically rounded or obtuse, rarely subacute, occasionally slightly revolute, pinnately veined, the secondary veins 3 or 4 on each side, arcuately ascending and usually originating near the base; midvein slightly impressed above and prominently elevated beneath, the veins forming a conspicuous reticulum on both sides; petioles thickened, ca. 3 mm long, glabrous or puberulent, rugose. Inflorescences axillary, shortly racemose, 3-8-flowered; rachis 0.5-1(-4) cm long; pedicels 12-18 mm long, rugose, glabrous to minutely puberulous; bracts basal, 1-2 mm long; bracteoles 2, medial to supramedial, deciduous, ciliate, deltoid to ovate, 0.5-1 mm long. Flowers with the hypanthium obscurely articulate with the pedicel, obconical, glabrous or minutely puberulous distally, 10-13 mm long, 5-winged to the sinuses, the wings fleshy, ca. 0.5 mm broad, projecting above the rim of the calyx to form a coriaceous spur 1-4 mm long; calyx limb dilated, the lobes apiculate, 0.2-0.6 mm long; corolla scarlet to orange red, green distally, cylindric, 13-20 mm long, ca. 5 mm in diameter at thickest point, slightly contracted below the throat externally glabrous, internally densely pilose distally with trichomes ca. 0.5 mm long, the lobes erect, triangular, acute, ca. 3 mm long, basally 1.5 mm wide, frequently bearing a perpendicular, fleshy, oblong spur; stamens 10, 7-8.5 mm long, about 1/2 as long as the corolla, the filaments connate, glabrous, 2-3 mm long, the anther sacs 5-7.5 mm long terminated by a single, elongate, conical tubule 3-5.5 mm long opening by an introrse cleft about 12/ its length; stigma truncate, the style often slightly exserted from the corolla tube.
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