Branching herb to 1.2 m in height. Stems striate, sparsely hairy, more densely so when young. Leaves opposite, both in each pair well developed but somewhat unequal; petiole 4 – 8 mm long, hairy; blades (6 –) 8 – 14 × 3 – 6 cm, elliptic, base acute and strongly asymmetrical, margin subentire to minutely serrulate, apex acuminate; 10 – 12 pairs of lateral veins curving upwards, sparsely hairy above and below, more densely so on midrib and veins. Inflorescences axillary, pedunculate and pendulous, 3 - to 5 - flowered; bracts 1 – 2 mm long, ovate, hairy to densely hairy; peduncles 35 – 80 mm long, sparsely hairy, slender (c. 0.5 mm in diameter); pedicels 7 – 15 (– 30) mm long. Calyx pale green, 4 – 5 mm long, slightly bilabiate, 5 - lobed, lobes triangular, acuminate, 2 – 3 mm long, sparsely hairy externally. Corolla white, 15 – 16 mm long, narrow below, widening to mouth apically, lower lobe larger than others c. 5 × 3 mm, other lobes smaller, somewhat recurved, c. 2 × 2 mm, glandular hairy externally. Stamens with filaments 4 – 5 mm long, attached c. 10 mm from base of corolla; anthers c. 1 mm long, not cohering at apices before dehiscence; staminodes 3, less than c. 1.5 mm long. Gynoecium 14 – 15 mm long; disc cupular, undulate, 1 mm long, glabrous; ovary and style glandular hairy; stigma bilobed, lobes vertical and pressed together, oblong, c. 1 mm long. Fruits narrowly cylindrical, 25 – 35 × 1.5 – 2 mm, green when young, glabrous except for glandular hairs on persistent style, calyx sometimes persistent.
Sumber: A TAXONOMIC REVISION OF CYRTANDRA (GESNERIACEAE) IN SULAWESI, INDONESIA