5. Damnacanthus henryi (H. Léveillé) H. S. Lo, Acta Phytotax. Sin. 17(3): 108. 1979.
云桂虎刺 yun gui hu ci
Canthium henryi H. Léveillé, Repert. Spec. Nov. Regni Veg. 13: 178. 1914; Prismatomeris brevipes Hutchinson; P. henryi (H. Léveillé) Rehder.
Shrubs or small trees, 1.5-5 m tall. Branches 4-angled to flattened, pale brown, smooth, glabrous. Petiole of developed leaves 2-5 mm, glabrous; leaf blade drying papery or leathery, lanceolate, narrowly elliptic, elliptic, or elliptic-oblong, 5-13 × 1-4 cm, glabrous, base acute or cuneate and often decurrent, margins entire and flat to usually thinly revolute, apex acute to long acuminate; midrib thinly prominulous adaxially; secondary veins 5-7 pairs; stipules caducous, interpetiolar, triangular to narrowly triangular, 1-1.5 mm, glabrous, acute. Inflorescences glabrous. Pedicels 2-3.5 mm. Calyx glabrous; hypanthium portion turbinate, 1-1.5 mm; limb ca. 0.8 mm, lobed for 2/3-3/4; lobes 4 or 5, narrowly triangular, sometimes separated by subtruncate sinuses. Corolla white or pale purple, glabrous outside; tube 9-12 mm, fenestrate at base; lobes 4 or 5, ovate-lanceolate, 3-4 mm. Drupes 5-8 mm in diam.; pyrenes 2, subglobose. Fl. Oct, fr. Dec-Feb.
● Dense forests on mountains; 1200-2500 m. Guangxi, Guizhou, Yunnan.
This species is here provisionally included in Damnacanthus based on its inflorescence morphology. It was reported to be distylous by Naiki and Nagamasu (Amer. J. Bot. 91: 664-671. 2004).