Aporosa yunnanensis (Pax & K.Hoffm.) F.P.Metcalf, Lingnan Sci. J. 10: 486 1931

Latin for 'from Yunnan', a province in southwestern China.

Aporosa wallichii forma yunnanensis Pax & K.Hoffm.

Treelets up to 8 m tall; branches smooth, glabrous. Stipules caducous; petiole 1-1.3 cm, apex bilateral with 2 glands; leaf blade oblong, oblong-elliptic, or oblong-ovate to lanceolate, 6-20 by 2-8 cm, membranous to thinly papery, adaxially dark green, glabrous, and densely black-mottled, abaxially greenish and glabrous, or only young nerves puberulent, base obtuse or broadly cuneate, margin entire or sparsely glandular-dentate, apex caudate-acuminate; lateral veins 5-7 pairs, curved and anastomosing to before margins, elevated below. Male flowers in axillary 2-4 cm spikes; bracts triangular, ca. 1.2 mm wide, pubescent outside; sepals 3-5, oblong-obovate, pubescent outside; stamens 2. Female flowers in few-flowered to 8 mm spikes; sepals usually 3, triangular, pubescent outside; ovary ellipsoid, glabrous, bilocular; ovules 2 per locule; styles 2, bifid at apex. Capsules subglobose, 8-13 by 6-8 mm, red-yellow when mature, glabrous; styles usually persistent at apex. Seeds elliptic, black-brown.

Densely forested slopes, scrub; 200-1500 m.

India, Burma, southern China and Hainan, Laos, Thailand, Vietnam.

Local names
China Yun nan yin chai.