Hydrangea hirsuta (Gagnep.) Y. De Smet & Granados

Shrubs 2-2.5 m tall. Branchlets, petioles, veins, and inflorescences crisped pubescent and pellucid villous. Petiole 1-1.5 cm; leaf blade lanceolate to elliptic-lanceolate, 10-15 × 3.5-6 cm, papery, abaxially densely hispidulous, adaxially hirsute, secondary veins 8-10 on both sides of midvein, base attenuate, margin serrate, apex acuminate to caudate. Inflorescence a corymbose cyme, aggregate, 3-5 cm wide; peduncle 3-5 mm. Flower buds obovoid, ca. 3 mm in diam.; pedicel ca. 2 mm. Calyx tube hirsute; lobes 5 or 6, lanceolate, 4-6 mm, hirsute. Petals 5, ovate-lanceolate, ca. 3 × 2 mm, abaxially glabrous or sparsely hirsute. Stamens 10-12; filaments filiform, often partly curved; anthers with filiform hairs. Ovary ca. 3/4 inferior. Styles 3-5; stigmas oblong. Berry 3-4 mm, hirsute. Fl. Apr-May, fr. Jul-Oct.

Guangxi, Yunnan [Vietnam].

Mixed forests; 400-1500 m.