Stoloniferous perennial, glabrous or sparsely pilose. Leaves with petioles 5–20 cm long; lamina palmatisect, 2.5–9 cm diam. (but juveniles trifoliolate with cuneate, crenate to somewhat dissected leaflets); ultimate segments mostly numerous, ± linear, 0.5–1.5 (–3) mm wide. Flowering stems erect, 1–4-flowered, mostly 15–50 cm high. Sepals 5, spreading, broadly ovate or obovate, 3.5–5.5 mm long, sparsely or densely pilose abaxially. Petals 7–11, obovate or narrow obovate, 7.5–12.5 mm long, yellow; nectary near petal-base, with lobe 0.7–1 mm long, free for up to c. 1/4 its length, rounded to truncate at apex. Stamens 30–50. Pistils 30–95. Receptacle moderately hispid throughout. Achenes lenticular, mostly 1.0–1.6 mm long; lateral faces with narrow transverse or diagonal ridges; margins not or slightly thickened; beak slender, recurved, 0.7–1 mm long.
Home