Shrubs 0.8–1 m tall. Branchlets brown, glabrous, rarely angled, with sparse, curved prickles. Leaves imparipinnate, 3–5-foliolate; petiole 5–8 cm, petiolule of terminal leaflet (0.5–)1–2 cm, lateral leaflets shortly petiolulate, glabrous or sparsely pilose, with small curved prickles; stipules lanceolate or linear-lanceolate, 7–10 mm, glabrous or slightly soft hairy; blade of leaflets narrowly elliptic to elliptic-lanceolate, 6–9 × 2–3 cm, terminal leaflet slightly longer than lateral leaflets, subherbaceous, both surfaces glabrous, base cuneate, rarely subrounded, margin irregularly densely sharply minute serrate to incised-doubly serrate, apex acuminate to caudate. Inflorescences terminal or axillary, clusters of 2 or 3(–5) flowers, rarely flowers solitary in leaf axils; bracts lanceolate or linear-lanceolate, 6–8 mm, glabrous or slightly pilose. Pedicel 1.5–2.5 cm, glabrous. Flowers 1.3–1.5 cm in diam. Calyx abaxially glabrous; tube short, broad; sepals spreading or reflexed in fruit, ovate-lanceolate, 7–9 × 2–3.5 mm, inner sepals slightly tomentose marginally, apex long caudate. Petals white, oblong or elliptic, much shorter than sepals, base clawed. Stamens many; filaments linear, basally slightly broader. Pistils shorter than stamens; style and ovary glabrous. Aggregate fruit ovoid-globose, 7–10 mm in diam., glabrous; pyrenes densely rugulose. Fl. Apr–May, fr. Jun–Jul.
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