Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

ascending to erect, 0.2–2(–2.5) dm, lengths 1–3(–4) 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–)2–8(–10) cm;

stipules: apex ± acute;

petiole 1–6.5(–8.5) cm, long hairs sparse to common, spreading to subappressed, 0.8–2 mm, weak to ± stiff, glands sparse to common;

leaflets 3, central obovate to broadly obovate, 0.5–2.5(–2.8) × 0.3–2(–2.2) cm, petiolule 0–3 mm, margins flat or slightly revolute, not lobed, distal 1/2–2/3(–3/4) evenly incised ± 1/2 to midvein, teeth (2–)3–5 per side, surfaces ± similar, abaxial usually pale green, sometimes grayish, hairs sparse to abundant, 0.5–1.7 mm, adaxial darker green, hairs and glands sparse.

2–4.

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

1–3(–5)-flowered.

0.2–0.8 cm (proximal to 2 cm).

straight, 0.3–3 cm in flower, to 9 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 narrowly to broadly oblong or ovate, 3.5–7 × 1.5–5 mm, margins flat;

hypanthium 4–7 mm diam.;

sepals 4–8 mm, apex subacute to rounded;

petals pale or bright yellow, 4–9 × 4–6 mm;

filaments 0.5–1.1 mm, anthers 0.2–0.4 mm;

carpels 50–80, styles ± columnar, not or scarcely papillate-swollen proximally, 0.6–0.9 mm.

1–1.2 mm, smooth to faintly rugose.

1.1–1.3 mm.

= 56.