Flora of North America species comparison

(0.2–)0.5–1.5 dm.

prostrate to ascending, 0.2–1.5 dm.

(2–)4–12(–14) cm;

leaflets 7–15(–18) per side, lobes (4–)6–10(–12), oblanceolate to obovate or elliptic.

tightly to loosely cylindric, (1–)2–12(–14) cm; sheathing base strigose to hirsute abaxially;

petiole 0.5–4 cm;

lateral leaflets (3–)5–15(–18) per side, separate to overlapping at least distally, ± flabellate, 1–4(–6) mm, incised to base or nearly so into 2–10(–12) oblanceolate to obovate or elliptic lobes, apex sometimes setose, surfaces ± sparsely hirsute, ± glandular;

terminal leaflets indistinct.

0.5–2.5 cm, blade reduced pinnate, lateral leaflets 1–3 per side.

(0–)1;

blade vestigial or reduced.

5–20-flowered, (1–)3–4(–6) cm diam. 2n = 28.

2–20-flowered, ± open, 0.5–4(–6) cm diam.

3–10(–12) mm.

5–10 mm diam.;

epicalyx bractlets 5, elliptic or narrowly oblong to ovate, 0.7–2(–3) mm;

hypanthium patelliform, 1–2 × 2.5–4.5(–5) mm;

sepals 1.5–3.5(–4) mm, acute to obtuse;

petals ± yellow, oblanceolate to spatulate or narrowly obovate, 1–3 mm;

stamens 5, filaments 0.8–1.8 mm, anthers yellow, oblong, 0.4–0.9 mm;

carpels 2–5(–6), styles 1.8–2.5 mm.

greenish cream to light brown, 1.5–2.2(–2.5) mm, smooth, prominently carunculate.