Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

ascending to erect, 0.3–1.5(–2) dm, lengths 1–2 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, ternate, (1–)4–10(–15) cm;

stipules: apex acute to obtuse;

petiole (0.3–)2–11(–13) cm, long hairs abundant, ascending to spreading, 1–2.3 mm, soft, glands sparse to common;

leaflets 3, central obovate, 0.7–2.5 × 0.5–1.6 cm, petiolule 0–1 mm, margins revolute, not lobed, distal 1/2–2/3 evenly incised ± 1/3 to midvein, teeth 2–3(–4) per side, surfaces ± similar, green (paler abaxially), hairs common, 1–1.5 mm, glands common (sparser adaxially).

2–4.

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

1–3-flowered.

0.2–0.8 cm (proximal to 2 cm).

straight, 0.5–2 cm in flower, to 3.5 cm 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 oblong, 3–7 × 1.2–2.5 mm, margins revolute;

hypanthium 4–6 mm diam.;

sepals 4–6(–7) mm, apex broadly acute to obtuse;

petals yellow, 9–12 × 8–10 mm;

filaments (2–)2.8–3.2 mm, anthers 0.5–0.8 mm;

carpels 40–50, styles filiform, not or scarcely papillate-swollen proximally, 1.7–2 mm.

1–1.2 mm, smooth to faintly rugose.

1.3–1.5.

= 56.

= 42, 56 (Russian Far East).