Description from Flora of China
Shrubs small, 1–2 m tall. Branchlets red-brown, slightly recurved, glabrous but glandular-pubescent; prickles usually sparse, robust, inflated at base. Leaves including petiole 5.5–9 cm; stipules mostly adnate to petiole, margin unequally serrate and glandular-pubescent, abaxially glandular, free parts lanceolate, apex long acuminate, rachis and petioles glabrous but glandular-pubescent and sparsely shortly prickly; leaflets 5–7, yellow-green abaxially, deep green adaxially, elliptic, rarely oblong, 2–3.5 × 1.2–2.2 cm, both surfaces glabrous, base rounded or subrounded, margin serrate or nearly doubly serrate, apex acute or shortly acuminate. Flowers 10–15 in panicle, 2.7–3 cm in diam.; pedicel 2–3 cm, densely glandular-pubescent; bracts caducous, unknown. Hypanthium obovoid, subglabrous or very sparsely glandular. Sepals 5, ovate-lanceolate, ca. 1 cm, abaxially glandular, adaxially densely tomentose-pubescent, margin glandular, apex acuminate. Petals double, white, obovate, base cuneate, apex rounded-obtuse. Styles connate in column, exserted, longer than stamens, pubescent. Hip unknown.
One of us (Robertson) has seen no specimens of this species.
About 1700 m. S Sichuan (Miyi Xian).