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, 2–5 dm.

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.

palmate or ternate.

3–8, proximal ones (3–)5–14 cm;

proximal petioles (1–)2–10 cm, long hairs sparse to common, spreading to loosely appressed, 1–2 mm, weak, short or crisped hairs sparse to common, cottony hairs absent, glands absent or sparse;

leaflets usually 5, central one oblanceolate to obovate, 2–4.5 × 1–2.5 cm, margins ± flat, distal 3/4+ usually unevenly, sometimes evenly, incised 1/3–2/3 to midvein (often with 1–2 incisions nearly to midvein), teeth 5–10 per side, surfaces similar or ± dissimilar, abaxial green to grayish green, long hairs sparse to common (especially on veins), 0.5–1.5 mm, soft to weak, short or crisped hairs ± sparse, cottony hairs absent, glands absent or sparse, adaxial long hairs absent or sparse, 1 mm, short hairs absent or sparse, crisped and cottony hairs absent, glands absent or sparse.

(5–)20–100+-flowered.

20–100+-flowered.

0.2–1(–2) cm.

0.5–1.5(–2.5) cm.

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 lanceolate to ovate or elliptic, 2–5 × 0.8–1.5 mm, lengths usually 2/3, sometimes 1, times sepals;

sepals 3.5–6.5 mm, apex ± acute;

petals 3–5 × 2–3 mm;

filaments 0.8–2 mm, anthers 0.3–0.5 mm;

carpels 40–70, styles 1–1.2 mm, scarcely papillate-swollen proximally.

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

1 mm, rugose.

= 14, 70.

= 28, 56 (Eurasia).