Hydrangea yaoshanensis (Y. C. Wu) Y. De Smet & Granados

Subshrubs basally prostrate, ca. 3 m tall. Branchlets, petioles, veins, and inflorescences adherent crisped pubescent and slightly pellucid villous. Petiole slender, 1-7 cm; leaf blade elliptic to ovate-elliptic, 5-17 × 3-7.5 cm, papery, both surfaces hirsute except along veins, secondary veins 5-11 on both sides of midvein, base cuneate to obtuse, margin serrate, apex acute. Inflorescence a corymbose cyme, aggregate, 2-4(-6) cm wide; peduncle 5-10 mm. Flower buds blue, oblong-obovoid, 5-7 mm; pedicel ca. 5 mm. Calyx lobes 5 or 6, lanceolate, 2.5-6 mm, densely hirsute. Petals oblong-lanceolate, 4-5 × 1.7-2 mm, densely hirsute on both surfaces. Stamens 10-12, ca. 7 mm; filaments filiform, unequal; anthers ellipsoid to ovoid, glabrous. Ovary subinferior. Styles 4 or 5, ca. 4 mm; stigmas oblong, oblique. Berry subglobose, 4-5 mm, sparsely villous. Fl. May-Jul, fr. Sep-Nov.

Guangdong, Guangxi, Hunan, Yunnan.

* Mixed forests in valleys; 500-1200 m.