Flora of North America species comparison

decumbent to erect, sometimes prostrate, (0.5–)1–4(–7) dm, hairs at base not stiff, not tubercle-based, glands absent or sparse, inconspicuous.

ascending to erect, (0.3–)1–3 dm, lengths 2 times basal leaves.

ternate, palmate, or subpalmate (with distal leaflets ± confluent), basal 3–15(–25) cm, cauline 2–7(–12) cm;

petiole: basal 1–9(–16) cm, cauline 0.5–4(–8) cm, long hairs usually common to abundant, ascending to spreading, 0.5–1.5 mm, usually ± weak, ± crisped hairs common to abundant, glands absent or sparse, inconspicuous;

leaflets 3–5(–7), at tip to distal 1/5 (basal) or 1/2 (cauline) of leaf axis, separate to ± overlapping, largest ones oblanceolate-elliptic to obovate, (0.5–)1–5(–6) × 0.5–2(–2.5) cm, distal 1/2–3/4 of margin evenly to unevenly incised 1/3–1/2 to midvein, sometimes cleft nearly to base, teeth 3–8 per side, surfaces moderately to abundantly hairy, glands absent or sparse.

2-ranked, ternate, (1–)3–12(–20) cm;

stipules: apex rounded;

petiole (0.5–)1–15(–18) cm, hairs and glands usually absent;

leaflets 3, central widely obovate to flabellate, (0.5–)1–5 × (0.4–)1–3(–3.5) cm, petiolule 0–5(–10) mm, margins flat, not or shallowly lobed (sinuses extending less than 1/2 to midvein), distal 1/2–3/4 usually unevenly incised 1/4–1/2 to midvein, teeth 3–7 per side, often secondarily toothed, surfaces similar, green, hairs absent or sparse, rarely common, 0.5–1 mm, glands absent or sparse.

(5–)20–100+-flowered.

1–6-flowered.

0.2–1(–2) cm.

straight, 0.3–4.5(–5) cm, not much longer in fruit than in flower.

epicalyx bractlets narrowly elliptic to ovate, (1.5–)2–4(–6) × 0.8–1.5 mm;

hypanthium (2–)3–5 mm diam.;

sepals 3–5 mm, apex broadly acute to obtuse;

petals pale yellow to yellow, broadly oblong-obovate, 1.5–2 × 1 mm;

stamens (5–)10(–15), filaments 0.4–0.9 mm, anthers 0.2–0.3 mm;

carpels 40–100, styles 0.5–0.6 mm.

epicalyx bractlets often toothed or 2-lobed, elliptic to oval, 3.5–7 × (1–)1.5–3 mm, margins flat;

hypanthium 3–7 mm diam.;

sepals 4–8 mm, apex acute to obtuse;

petals dark yellow, (5–)6–10(–12) × (3–)5–10 mm;

filaments 1.5–3 mm, anthers 0.6–1.5 mm;

carpels 20–50, styles filiform, not or slightly papillate-swollen proximally, 1.6–2.5 mm.

yellowish, 0.7–0.9 mm, ± smooth, without a corky protuberance.

1.2–1.5 mm.

= 14, 70.

= 28.