Caudex branches short. Stems ± tufted, (2–)2.5–6(–8) dm; base 2–3 mm diam., moderately to densely septate-glandular. Leaves glabrate or sparsely hairy (hairier at northern margin of range); basal (8–)20–30 cm, leaflet pairs 2–4; terminal leaflet ± obovate, 2–6(–7) × (1–)1.5–3 cm, teeth ± double, 5–25 per side, apex obtuse to acute; cauline 0–2, well developed, leaflet pairs 1–3. Inflorescences (5–)10–30(–60)-flowered, leafy, open, 1/6–2/3 of stem, wide, branch angles (20–)30–60°. Pedicels 5–40 (proximal to 45) mm, sparsely to moderately short-hairy, predominantly septate-glandular. Flowers opening widely; epicalyx bractlets linear-oblanceolate, 2–6 × 0.5–1 mm; sepals spreading, 4–7(–8) mm, apex usually acute, rarely obtuse; petals ± overlapping, spreading, usually bright, sometimes pale, yellow, broadly obovate to round, 5–12 × (4–)5–11 mm, usually longer, rarely shorter, than sepals; filaments 1.5–4 mm, anthers 0.7–1 mm; styles thickened, 1 mm. Achenes brown to reddish, 1.2 mm.
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