石山楠 shi shan nan

Trees, up to 13 m tall. Branchlets castaneous, angular, ca. 2.5 mm in diam., glabrous. Petiole 1.5-3 cm, canaliculate adaxially, glabrous; leaf blade shiny adaxially, elliptic, 11-19 × 3.5-6 cm, leathery, glabrous on both surfaces, midrib and lateral veins elevated on both surfaces, lateral veins 9-13 pairs, slender, reticulate veinlets dense, foveolate and usually conspicuous on both surfaces, base attenuate or cuneate, apex long acuminate. Panicles many, terminal, 15-25 cm, glabrous. Pedicel 1-1.3 cm. Perianth lobes ovate, subequal, 3-4 × ca. 2 mm, outer 3 lobes glabrous on both surfaces, inner 3 lobes glabrous outside, densely gray-white villous inside. Filaments of 1st and 2nd series sparsely villous, of 3rd series densely villous, with reniform glands. Staminodes sagittate, ca. 2 mm, stalked. Ovary ovoid; stigma capitate. Fruit ovoid, 8-10 × 5-6 mm; persistent perianth lobes leathery, clasping at base of fruit. Fl. Apr-May, fr. Aug.

● Limestone hills, mixed broad-leaved forests. Guangxi, S Guizhou (Libo).