Description from Flora of China
Croton yangchunensis H. G. Ye & N. H. Xia.
Shrubs or treelets 1-6 m tall; indumentum purple-brown or purplish waxy stellate-pubescent; branches glabrous. Petiole 1.5-5 cm, apex with 2 stalked and cupular glands; leaf blade thinly leathery, oblong-elliptic or elliptic-ovate, 5-13 × 2.5-5 cm, black when dried young, major veins sparsely stellate- pubescent when young, glabrescent, base rounded, margin entire, apex acute to acuminate; basal veins 3, lateral veins 3-5 pairs, arcuately ascending, anastomosing near margins. Inflorescence terminal, 7-20 cm, proximal 4-6 flowers female, others male. Male flowers: bud ovoid, ca. 1.5 mm in diam., apex hairy. Female flowers: sepals 5, oblong-elliptic, ca. 2.5 mm; ovary densely yellow-tomentose; styles 3, bipartite, lobes linear. Capsule subglobose, ca. 8 mm in diam., stellate-hairy. Fl. May-Jun, fr. Jul-Sep.
● Open forest margins, limestone brushwood, rocks on hills and in valleys; 300-800 m. Guangdong (Ruyuan, Yangchun, Yangshan, Yingde).