Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

ascending to erect, (0.3–)1–4(–6) dm.

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.

pinnate, (2–)4–20(–25) cm;

petiole 1–8 cm, long hairs sparse to abundant, rarely absent, spreading to ascending, 0.5–3 mm, weak to ± stiff, short hairs abundant to dense, rarely absent, cottony or crisped hairs absent, glands sparse to abundant, often obscured;

leaflets (2–)3–5(–7) per side, on distal 1/2–3/5 of leaf axis, separate to scarcely overlapping, terminal ones narrowly to broadly oblanceolate, (1–)1.5–5(–6) × 0.5–1.5(–2) cm, margins strongly revolute, incised ± 3/4 to midvein, sometimes more or only ± 1/2, undivided medial blade 2–4(–8) mm wide, teeth 4–8(–10) per side, triangular-ovate to linear-elliptic, surfaces usually ± dissimilar, abaxial ± grayish to nearly white, rarely green, long hairs sparse to abundant (mostly on veins), rarely absent, 0.5–1.5 mm, ± weak, short hairs usually abundant to dense, rarely absent, crisped and cottony hairs absent, glands ± abundant, sometimes obscured, adaxial green to gray-green, long hairs sparse to abundant, rarely absent, spreading to ascending, ± 1 mm, short hairs ± abundant, sometimes obscured, rarely absent, cottony and crisped hairs absent, glands ± abundant.

2–4.

1–4.

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

(1–)3–40-flowered, congested or elongating in fruit.

0.2–0.8 cm (proximal to 2 cm).

0.2–1 cm (proximal to 3.5 cm).

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 usually ± lanceolate-elliptic, rarely ± ovate-elliptic, 3–6(–8) × (1–)1.5–2(–2.5) mm, lengths ± equal to sepals, margins ± revolute;

hypanthium 3–6 mm diam.;

sepals (3–)4–6(–8) mm, apex acute to obtuse, abaxial surfaces: venation indistinct, glands abundant, ± evident;

petals pale to bright yellow, (3–)4–7 × (3–)4–7 mm, lengths ± equal to sepals;

filaments (0.5–)1–2 mm, anthers 0.5–0.8(–1) mm;

carpels 50–100, styles papillate-swollen in proximal ± 1/2, ± 1 mm.

1–1.2 mm, smooth to faintly rugose.

1.2 mm, ± to strongly rugose.

= 56.

= 28.