Subshrubs (dwarf), ?subscapose?, 0.2–0.8[–1.5] dm; rhizomatous, ?rhizomes branching, slender, woody; fibrous-rooted?. Stems 1–5+, decumbent to ascending, simple, glabrous. Leaves deciduous, cauline (often crowded near stem apices), pinnately compound; stipules adnate to petiole base, linear, margins entire; petiole present; blade elliptic to obovate, 1–3.5 cm, herbaceous, leaflets 3–11, narrowly elliptic to obovate or rhombic, margins flat, entire or sharply lobed or toothed apically, venation pinnate, surfaces glabrous. Inflorescences terminal, flowers solitary; bracts 1 or 2. Pedicels present. Flowers 15–25 mm diam.; epicalyx bractlets 5; hypanthium saucer-shaped, 2 mm, puberulent; sepals 5, spreading, ovate; petals 5, white, some yellow at base or fading yellowish, obovate to elliptic; stamens 100–120, shorter than petals; torus hemispheric, ?short-hairy?; carpels 30–70, hairy, ?styles not geniculate-jointed?; ovule 1. Fruits aggregated achenes, 30–70, ovoid to fusiform, tapered apically, 2 mm, hairy; hypanthium persistent; sepals persistent, spreading to reflexed; styles persistent, elongating to 20[–27] mm, not hooked, ?pilose except distal 1 mm?. x = 7.
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