Siam Benzoin

Trees 9--12 m tall. Branchlets terete, densely gray-brown stellate tomentose. Leaves alternate; petiole 1--1.5 cm, nearly 4-angled; leaf blade ovate to ovate-lanceolate, 5--7 X 3--6.5 cm, leathery, abaxially densely gray-brown stellate tomentose, adaxially glabrous or primary vein densely stellate pubescent, base rounded, margin subentire, apex acuminate, secondary veins 5--9 pairs, tertiary veins subparallel. Inflorescences axillary, racemes or panicles, many-flowered, 2.5--5 cm. Pedicel ca. 4 mm. Flowers 1--1.2 cm. Calyx ca. 3.5 X 3 mm, truncate to undulate, rarely 5-toothed, densely stellate tomentose. Corolla tube ca. 2 mm; lobes oblong-lanceolate, ca. 9 X 2 mm. Filaments densely stellate villose on free part. Fruit globose to subglobose, 1--1.6 in diam., rugose, densely gray stellate tomentose, 3-valvate dehiscent. Seeds brown, glabrous. Fr. Oct.

S Yunnan [Laos, Myanmar, N Thailand, Vietnam].

Forest thickets in ravines; 800--1000 m.