18. Philadelphus subcanus Koehne, Mitt. Deutsch. Dendrol. Ges.
毛柱山梅花 mao zhu mei hua
Shrubs 3-6 m tall. Branchlets of previous year gray-brown, those of current year purple, sparsely white villous or glabrous. Petiole 5-10 mm; leaf blade ovate or broadly so, 6-14 × 3-7 cm, ovate or ovate-lanceolate and 3-12 × 2-5 cm on flowering shoots, papery, abaxially sublanate-villous or villous only along veins, adaxially sparsely hirsute, veins 3-5, basifugal, base cuneate or broadly so, margin sparsely serrulate, apex acute or acuminate. Racemes 9-11-flowered, occasionally paniculate and 5-25-flowered on vigorous shoots; rachis 2.5-15 cm; pedicels 5-10(-15) mm, densely villous. Calyx tube golden yellow or gray-yellow villous, with underlying surface visible; lobes ovate or ovate-lanceolate, 6-7 × 3-4 mm, apex acute or acuminate, acumen 1-1.5 mm. Corolla discoid; petals white, obovate or elliptic, rarely ovate-elliptic, 1-1.8 × 0.7-1.3 cm. glabrous to setose. Stamens 25-33, longest ones ca. 1 cm; anthers oblong, ca. 1.5 mm. Disc and style golden yellow villous at base. Style apically slightly divided or divided for ca. 2/3 its length, ca. 6 mm; stigmas spatulate, 1.5-2 mm, longer than anthers. Capsule obovoid, 8-10 × ca. 6 mm, with persistent calyx lobes subapically. Seeds 3-3.5 mm, with tail ca. 1 mm. Fl. Jun-Jul, fr. Aug-Oct.
* Mixed forests, thickets; 500-2300 m. Hubei, Sichuan, Yunnan.