Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

prostrate to decumbent, rarely weakly erect, 0.3–1.5 dm, lengths 1–2(–3) times basal leaves.

subpinnate to subpalmate, (6–)10–25 cm;

petiole (2–)5–15 cm, long hairs dense, appressed, 1–2 mm, soft to ± stiff, short hairs absent, crisped hairs sparse, glands absent, sparse, or obscured;

leaflets 2–3 per side, on distal 1/6–1/3(–1/2) of leaf axis, separate to ± overlapping, terminal ones oblanceolate, (2–)3–6(–10) × 1–2(–3.5) cm, margins revolute, incised 3/4+ to midvein, undivided medial blade 1.5–6 mm wide, teeth 5–8 per side, ± linear, surfaces ± to strongly dissimilar, abaxial usually white, rarely grayish, long hairs abundant especially on veins, 1–2 mm, ± weak, short hairs absent or obscured, cottony (and crisped) hairs ± dense, glands absent or obscured, adaxial green to grayish, long hairs sparse to abundant, loosely appressed, 0.5–1.5 mm, short hairs absent or sparse, crisped and/or cottony hairs sparse to common, glands sparse to common.

not in ranks, palmate, 2–5(–10) cm;

stipules: apex acuminate to acute, rarely obtuse;

petiole 1–6 cm, long hairs common, ascending to appressed, 1–2.5 mm, weak to ± stiff, glands absent or sparse;

leaflets 5–7, central oblanceolate to obovate, (0.8–)1–3 × 0.4–1.5 cm, petiolule 0–2 mm, margins flat, not lobed, distal 1/4–1/2(–2/3) evenly incised ± 1/3 to midvein, teeth 2–4(–5) per side, surfaces similar, green, hairs absent especially adaxially or sparse, 0.5–1.5(–2) mm, glands absent or sparse.

2–4.

(4–)10–50(–100)-flowered, congested or elongating in fruit.

3–5(–6)-flowered.

0.2–0.8 cm (proximal to 2 cm).

often recurved, 1–3(–4) cm, not much longer in fruit than in flower.

epicalyx bractlets narrowly elliptic to lanceolate, 2.5–6 mm, lengths ± 2/3 times sepals, margins flat;

hypanthium 3–5 mm diam.;

sepals 3–6 mm, apex ± acute, abaxial surfaces: venation indistinct, glands absent, sparse, or obscured;

petals yellow, 3–5 × 3–4 mm, lengths ± equal to sepals;

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

carpels 50–80, styles papillate-swollen in proximal 1/2–3/4+, 1–1.2 mm.

epicalyx bractlets lanceolate, 3.5–5 × 1–1.5 mm, margins flat;

hypanthium 2–4 mm diam.;

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

petals yellow, 5–8(–10) × 4–6 mm;

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

carpels 40–60, styles ± columnar, not papillate-swollen proximally, 1 mm.

1–1.2 mm, smooth to faintly rugose.

1.5–2 mm.

= 56.

= 28, 35, 42, 49, 56, 63, 70, 84 (Europe).