Flora of North America species comparison

sparse, uncolored, minute.

ascending to erect, (1–)2–5 dm.

1.5–5(–7) 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.

4–25(–35) cm;

petiole 2–20(–25) cm, hairs sparse to common, ± spreading, 1–2.5 mm, weak, glands absent or sparse;

leaflets 5–7(–9), central one narrowly to broadly oblanceolate, 1–6(–9) × 0.5–2 cm, distal 2/3–3/4+ of margin incised 1/4–1/3(–1/2) to midvein, teeth (4–)6–10(–13) per side, surfaces ± similar, abaxial green to pale green, hairs sparse to common on primary veins, ascending to spreading, 0.5–1.5 mm, weak, adaxial green, hairs more appressed and shorter.

2–4.

1–3;

stipules fused with less than 1/3 of petiole, free portion longer than fused portion.

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

5–20-flowered.

0.2–0.8 cm (proximal to 2 cm).

1–3 cm (proximalmost to 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 linear to lanceolate, 3–8 × 1–1.5(–2) mm;

hypanthium 3–5 mm diam.;

sepals 3–5 mm, apex ± acute;

petals (5–)8–10 × 4–10 mm;

filaments 0.3–1.5 mm, anthers 0.7–0.9 mm;

carpels 35–50, styles 1.1–1.3 mm.

1–1.2 mm, smooth to faintly rugose.

1–1.2 mm, faintly rugose.

= 56.

= 42, 56 (Eurasia).