Flora of North America species comparison

0.2–1.6 dm, lengths 1/2–3(–4) times basal leaves.

ascending to erect, (0.4–)1–2 dm, lengths 2–4 times basal leaves.

usually palmate to subpalmate, sometimes subpinnate, 1(–2) pair of leaflets separate from terminal leaflets, distal leaflets distinct, 2–10(–15) cm;

petiole 1–7(–10) cm, straight hairs ± abundant, ± appressed, 1–3 mm, stiff to weak, cottony hairs present, sometimes absent;

leaflets 5(–7), on tip or to distal 1/4 of leaf axis, separate to ± overlapping, proximal pair separated from others by 0–5(–10) mm of leaf axis, central leaflets narrowly oblanceolate to obovate, 1–3(–7) × 0.4–1.2 cm, petiolules 0–2(–4) mm, distal 1/4 to whole margin incised 1/4–3/4+ to midvein, teeth (1–)2–5(–10) per side, separate, 1–6 mm, surfaces strongly to ± dissimilar, abaxial grayish to white, straight hairs ± abundant, ± appressed, 0.5–2 mm, weak to stiff (especially on veins), cottony hairs ± dense, rarely sparse, glands sparse or obscured, adaxial green to grayish, straight hairs common to abundant, appressed, 0.5–2 mm, mostly stiff, sometimes weak or mixed, cottony hairs absent or sparse, rarely common, glands ± sparse.

not in ranks, ternate, (1–)2–5(–7) cm;

stipules: apex acute to rounded;

petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent;

leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–)3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–)3(–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent.

(1–)2–12-flowered.

1–6-flowered.

1–2(–3) cm.

straight, 0.5–2 cm in flower, to 5 cm in fruit.

epicalyx bractlets lanceolate to narrowly ovate to linear-elliptic, sometimes doubled, (2–)2.5–5 × 1–1.5 mm;

hypanthium 3–6 mm diam.;

sepals 3.5–6 mm, apex acute;

petals (2.5–)4–9 × (2–)3–7 mm;

filaments 1–3 mm, anthers 0.5–1 mm;

carpels (7–)10–30, styles (1–)1.5–2 mm.

epicalyx bractlets elliptic to oval, 2–4.5 × 1–2 mm, margins flat;

hypanthium 2.5–4 mm diam.;

sepals 3–5.5 mm, apex acute to obtuse;

petals yellow, 4–7 × 4–6 mm;

filaments 1–3 mm, anthers 0.5–0.9 mm;

carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm.

1.5–2.5 mm, smooth to lightly rugose.

1.2–1.5 mm.

= 70.