Tree or shrub; branches and branchlets very slender, brunnescent, submargined-tetragonal, glabrous; leaves opposite; petioles 1-4 mm long, brunnescent, glabrous; blades membranous, dark-green (nigrescent in drying) above, paler beneath, narrowly oblong-elliptic, 1.5-5.5 cm long, 5.5-14 mm wide, acute at apex, acute or attenuate at base, pulverulent or glabrous on both surfaces, punctate beneath; midrib very slender, flat or subimpressed above, flat or very slightly subprominulous beneath, nigrescent; secondaries few, very slender, 2-5 per side, irregularly arcuate-ascending, plainly anastomosing near the margins, obscure or subimpressed above, flat and nigrescent beneath; vein and veinlet reticulation indiscernible on either surface; inflorescence axillary; cymules single, opposite, about equaling the subtending leaves, 1-flowered; corolla purple.
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