Large terrestrial herbs or shrubs, rarely epiphytic; stems more or less erect, 0.3-1.5 m tall, slender, ca. 5 mm in diam., purplish, sparsely pilose to glabrous; branches few or none. Leaves strongly unequal in a pair; elliptic or oblong, often falcate, 7-18 cm long, 3.5-9.5 cm wide, membranous, the apex acute to acuminate, the base oblique, cordate to acute, the margin serrate, above dark green, sparsely pilose, below lighter green or purplish, nearly glabrous but sparsely pilose along the prominent midvein; petioles 1.5-3.5 cm long, green to purplish, sparsely pilose; smaller leaves in a pair to 3.5 cm long, short petio-late. Inflorescences in the upper leaf axils or terminal, paniculate, to 20 cm long, with short side branches of several flowers; primary peduncles ca. 7 cm long, purplish, sparsely pilose, the bracts linear lanceolate, caducous, ca. 7 mm long; ultimate pedicels ca. 5 mm long at anthesis, elongating in fruit, purplish, pilose with uncinate trichomes. Flowers with the floral tube cylindric, 2-5 mm long at anthesis, the base rounded or gibbous, brown to purplish, densely puberulent with uncinate hairs and short glands; calyx lobes oblong or broadly triangular, 2-6 mm long, 1-2 mm wide, the apex rounded to acute, often re-curved, entire, outside purplish, pilose, inside lighter, to yellow, more or less glabrous; corolla white at least at the base, above dark pink to purplish, the tube oblique in the calyx, campanulate, 1.4-1.8 cm long, 2-4 mm wide at the base, 1.1-1.8 cm wide at the throat, the outside pilose, the inside glabrous, the lobes of the limb nearly equal, subpatent, 3.8 mm long, entire, the stamens included, the filaments adnate to the base of the corolla tube, curved, ca. 1 cm long, glabrous, the anthers coherent by their apices into a square; disc lacking, ovary apex pilose, style ca. 1.2 cm long, glabrous, the stigma stomatomorphic. Capsule cylindric, curved at the base, 1.0-1.5 cm long, 3 mm in diam., reddish brown; seeds not seen. Chromosomes n = 13 (Lee, 1966a).
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