Shrubs, 1–12(–20) dm, ?herbage strongly aromatic?. Stems 3–20+, sparsely branched; bark gray or reddish brown, smooth; long shoots present. Leaves persistent, 2–3-odd-pinnately compound; stipules persistent 1st year, deciduous with leaf base 2d year, linear-subulate, margins entire, ?sometimes stipitate-glandular?; petiole present; blade obovate to obtrullate or lance-elliptic in outline, (2.8–)3.5–7(–9.4) cm, leathery, surfaces hirtellous; pinnae 8–17 per side, oblong to oblong-obovate, pinnately or 2-pinnately divided; ultimate segments oblong-obovate to obovate or obliquely obovoid, margins entire. Inflorescences terminal, (1–)2–7(–10)-flowered, corymbs or panicles; bracts present; bracteoles present. Pedicels present. Flowers 10–19 mm diam.; hypanthium funnelform-turbinate, 3–6 mm diam., exterior hairy, usually stipitate-glandular; sepals 5, reflexed, deltate; petals 5, caducous, white, orbiculate, ?base short-clawed, margins erose-undulate, apex often retuse?; stamens 35–65(–76), shorter than petals; torus absent; carpels 1(or 2), sessile, stigmas lateral. Fruits achenes, 1, subglobose, 3–5.5 mm, smooth; hypanthium persistent; sepals persistent, erect. x = 9.
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