Buxus austroyunnanensis Hatus.

Shrubs small, prostrate or erect, 0.5-2.5 m tall; branchlets terete; young branches tetragonous, ca. 1 mm in diam., pubescent. Petiole very short; leaf blade oblanceolate or narrowly oblanceolate, 2-3.5 × 0.7-1 cm, thinly leathery, adaxially puberulent or subglabrous along midrib, base cuneate, margin revolute, apex obtuse, with mucronulate or retuse tip; midrib elevated on both surfaces, lateral veins and veinlets dense and visible on both surfaces. Inflorescences axillary; rachis clavate and elongate post male flower anthesis, pilose; bracts ovate, persistent, 1.5-2 mm, acute, margin scarious, abaxially pilose. Male flowers ca. 8; pedicels ca. 1 mm; tepals broadly ovate, 2-2.5 mm, glabrous, persistent; sterile pistil ca. 1 mm, inflated at apex. Female flowers: tepals ovate, 2-2.5 mm, glabrous, persistent; ovary ca. 1.5 mm; style compressed and wide, 2.5-3 mm, attenuate upward, slightly recurved or erect; stigma narrowly obcordate, decurrent to middle part of style. Capsule globose, 6-8 mm in diam.; persistent style ca. 3 mm; carpopodium 6-8 mm. Fl. Mar-Apr, fr. Sep-Nov.

S Yunnan (Jinghong, Lancang, Shuangjiang).

● In crevices or thickets along riverbanks or streamsides; 400-900 m.