2. Deutzia parviflora Bunge, Enum. Pl. China Bor. 31. 1833.
小花溲疏 xiao hua sou shu
Shrubs ca. 2 m tall. Flowering branchlets 3-8 cm, 4-6-leaved, stellate hairy. Petiole grayish brown or gray, 3-8 mm; leaf blade elliptic-ovate or ovate-lanceolate, 3-6(-10) × 2-4.5 cm, papery, abaxially 6-12-rayed stellate hairy, hairs along midvein usually with long central rays, adaxially 5(or 6)-rayed stellate hairy, base broadly cuneate or rounded, margin serrulate, apex acute or acuminate. Inflorescences corymbose, 2-5 cm in diam., usually many flowered; peduncle villous or stellate hairy; pedicels 2-12 mm. Calyx tube cupular, ca. 3.5 × 3 cm, densely stellate hairy; lobes deltoid, shorter than tube, apex obtuse. Petals imbricate, white, broadly ovate or suborbicular, 2.5-7.5 mm, hairy on both surfaces, base attenuate, apex obtuse. Outer stamens 4-4.5 mm; inner stamens 3-4 mm; filaments subulate, toothless or inner ones 2-dentate, teeth (if present) not reaching anthers; anthers stalked, globose. Styles 3, shorter than stamens. Capsule hemispheric, 2-3 mm in diam. Fl. Apr-Jun, fr. Jul-Oct.
Mixed forests and thickets, mountain slopes, valleys; 300-1800 m. Gansu, Hebei, Heilongjiang, Henan, Hubei, Jilin, Liaoning, Nei Mongol, Shaanxi, Shanxi [Korea, Russia].