Flora of North America species comparison

0.2–1.5(–2) dm.

0.4–1.7 dm.

palmate, rarely ternate, (1–)2–7(–18) cm;

petiole (0.5–)1–5(–11) cm, long hairs sparse to abundant, ± spreading (to ascending), 1–3(–4) mm, ± weak, glands ± abundant;

leaflets (3–)5(–7), central flabellate to obovate-cuneate or oblanceolate, (0.5–)1–3(–8) × 0.5–2 cm, not or ± petiolulate, distal 2/3–3/4 of margins evenly to unevenly incised 1/5–3/4 to midvein, sometimes deeply lobed as well, teeth 2–9 per side (some secondarily toothed as well), surfaces green, long hairs sparse to common, 1–2 mm (late-season leaves and adaxial surfaces sometimes nearly glabrate), glands sparse to abundant.

ternate, (1.5–)2–6(–8) cm;

petiole 0.8–5(–7) cm, long hairs sparse to abundant, usually ± spreading, sometimes ascending, 0.5–1 mm, weak to ± stiff, glands sparse to common;

leaflets 3, central obovate-cuneate, (0.2–)0.5–1(–1.5) × 0.2–1 cm, scarcely petiolulate, distal 1/2–2/3 of margins evenly incised 1/3–1/2 to midvein, teeth (1–)2–3(–4) per side, surfaces green, long hairs sparse to common, 0.5–1 mm, glands sparse to abundant.

(1–)3–15-flowered.

1–4-flowered.

0.5–1.5(–2) cm.

0.5–2(–4) cm.

epicalyx bractlets lanceolate-elliptic, 1.5–3(–5) × 0.5–1.5 mm;

hypanthium 2.5–4 mm diam.;

sepals (2.5–)3–5(–6) mm, apex ± acute;

petals nearly white abaxially, pale yellow adaxially, narrowly obcordate, 3–6(–8) × 2.5–5 mm;

filaments 1.5–2.5 mm, anthers 0.5–1 mm;

carpels 4–12, styles 2–3 mm.

epicalyx bractlets sometimes paired, narrowly elliptic, 1.5–2(–2.5) × 0.5–1 mm 1/2–3/4 as long as sepals;

hypanthium 2–3 mm diam.;

sepals 2.5–4 mm, apex broadly acute;

petals ± paler abaxially, bright yellow adaxially, ± obcordate to broadly obovate, (2–)3–4 × 2–3 mm;

filaments 1–1.5 mm, anthers 0.3–0.5 mm;

carpels 10–25, styles 1–1.5 mm.

1.5–2 mm, ± rugose.

1.3 mm, smooth to lightly rugose.

hairs well differentiated from long hairs, ± abundant to dense throughout.

hairs not well differentiated from long hairs, absent or sparse throughout.