Scrambling shrub. Branchlets subterete, striate longitudinally, glabrous. Leaves lanceolate, long to caudately attenuate towards the apex, acute, base cuneate to the petiole, subcoriaceous, laxly punctulate beneath, glabrous otherwise, slightly revolute at the margin which is remotely and finely subserrate-crenulate, 7-12 by 1.2-2 cm, midrib impressed over the entire length above, bluntly prominent beneath, one pair of nerves a little from above the base and high curved-ascendent along the edge, slightly impressed above at least in the lower ⅔, not much prominent beneath, other nerves or veins ± obscure; petiole grooved above, 0.6-1 cm by c. 1.5 mm. Fascicles (2-)3-6-flowered. Pedicels rather slender, very shortly hairy besides a few thicker longer subglandular hairs found below the calyx, 7-10 mm. Bracteoles carinate, shortly hairy dorsally. Calyx tube obconical, 2 mm, the lower half hidden by the bracteoles, lobes triangular, blunt, 2 mm, shortly subglandular-fimbriate. Corolla campanulate, broadly opened, thin, greenish white, c. 7 mm long, 5-6 mm ø at the limb, lobes reflexed, 1 mm. Filaments linear, glabrous, c. 3 mm; anthers elongate-ovate, much attenuate-acuminate distally, base subcordate, 2.5 mm. Ovary glabrous or with a few hairs around the style, the latter glabrous, slender, 5.5 mm, exserted for c. 2 mm at anthesis.
In montane forest on exposed ridge, at 2010 m, said to occur up to 2200 m, rather rare. Fl.--07.
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