Stems (2–)3–7(–8) dm, lengths (1–)1.5–2.5 times basal leaves. Basal leaves pinnate, 15–45(–50) cm; petiole (5–)8–20 cm, long hairs abundant to dense, ascending to appressed, (1–)2–3 mm, ± stiff, rarely weak, short or crisped hairs absent or sparse, cottony hairs absent, glands sparse, often obscured; leaflets not conduplicate, lateral ones evenly paired, (3–)4–7 per side on distal ± 1/2 of leaf axis, most pairs ± decurrent, ?rachis winged?, distal sometimes confluent with terminal leaflet, larger leaflets narrowly obovate, (2–)3–7 × 1–2.5 cm, distal 3/4+ of margin incised 1/3 to midvein, teeth 6–18 per side, 1–4 mm, surfaces ± similar, abaxial grayish, long hairs sparse to common (mostly on veins), 0.5–2 mm, ± stiff, rarely weak, short-crisped hairs absent or sparse to common, cottony hairs absent, glands sparse to common, adaxial green to grayish, long and short hairs not differentiated, sparse to common, crisped and cottony hairs absent, glands absent or sparse. Cauline leaves (0–)1–3. Inflorescences (10–)20–60-flowered. Pedicels (0.5–)1–3(–6) cm. Flowers: epicalyx bractlets lanceolate to narrowly ovate or elliptic, 3–6 × 1–1.5 mm, 2/3 as long as to nearly equal to sepals, abaxial vestiture ± similar to sepals, not glabrescent, straight hairs sparse to common, crisped or cottony hairs usually absent; hypanthium 3–6 mm diam.; sepals 4–7 mm, apex acute to acuminate; petals (6–)7–10 × 5–9 mm; filaments (1–)1.5–4 mm, anthers 0.7–0.9(–1) mm; carpels 20–30, styles (1–)1.8–3 mm. Achenes 1.4–1.6 mm, smooth. 2n = 82.
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