Erect shrub, 1-1.30 m high. Branches subterete, 4-6 mm ø, pubescent. Leaves chartaceous, broad-elliptic or elliptic, 18.5-26 by 9-18 cm; apex acuminate; base rotund; glabrous above, sericeous beneath; basal nerves 2 (rarely 3) pairs, the inner one ascending obliquely upward to halfway, the outer 1 or 2 weak and short, close to the margin; lateral nerves 6-9 pairs; veins distinctly crossbar-like; nerves and veins prominent beneath, visible rarely distinct above; petiole c. 1 cm, pubescent. Inflorescences axillary, in axils of bracts or reduced leaves, spiciform, c. 3 cm long, puberulous; bracts elliptic or slightly obovate, 2.5-3 mm long, both surfaces puberulous. Pedicel and ovary 7-12 mm long, puberulous. Perianth bright purple, short-cupular, c. 12.5 mm long, with distinct, longitudinal veins, sparsely puberulous outside, densely glandular hairy inside; tube short-cupular, c. 9.5 mm long; lobes arcuate, c. 3 by 10 mm, obscurely cuspidate at the apex. Stamens in 2 whorls: upper one 8-10, lower 11-14; filaments glabrous, 1-1.5 mm; anthers oblong, 1-1.5 mm long. Style column c. 2 mm long; lobes 6-12, radiate, c. 1.5 mm long. Capsule (only one seen) narrow fusiform, 4.5 by 0.6 cm, straight, distinctly 4-angular, almost glabrous. Seeds flattened, boat-shaped, broad-ellipsoid in side view, c. 2-2.5 mm long, ± obtuse or truncate at both ends (depending on the position in the fruit), rather smooth with only sparse granules on both surfaces.
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