Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

decumbent to ascending, sometimes prostrate, 0.6–2.2 dm, lengths 1.5–3 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.

pinnate with distal leaflets ± distinct, 4–10 × 1–2(–3) cm;

petiole 1–3 cm, straight hairs dense, ± appressed, 1–2 mm, stiff, cottony hairs absent, glands absent or sparse;

primary lateral leaflets 5–7(–9) per side (sometimes with additional interspersed leaflets), on distal (1/2–)2/3–3/4 of leaf axis, ± overlapping, largest ones oblanceolate- to obovate-oblong, 0.5–1.5 × 0.4–0.8 cm, distal 3/4 to whole margin pinnately incised nearly to midvein, teeth (5–)7–9, linear-oblanceolate, 2–6 × 0.5–1 mm, apical tufts 1 mm, surfaces grayish green, straight hairs sparse (adaxially) to common, ± appressed, 1–2 mm, stiff, cottony hairs absent, glands absent or obscured.

2–4.

(1–)2–3(–4).

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

3–15-flowered, ± compactly cymose, opening in fruit.

0.2–0.8 cm (proximal to 2 cm).

0.7–2(–2.5) cm, straight in fruit.

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 narrowly elliptic, sometimes doubled, 2–3.5 × 1–1.5 mm;

hypanthium 3–4 mm diam.;

sepals 4–6 mm, apex ± acute;

petals 4–5(–6) × 3–4(–5.5) mm;

filaments 1–2 mm, anthers 1–1.5 mm, often as long as filaments;

carpels 8–20, styles 2 mm.

1–1.2 mm, smooth to faintly rugose.

1.8 mm, ± smooth, not carunculate.

= 56.