Flora of North America species comparison

ascending to erect, (1–)2–5 dm.

ascending to erect, 0.3–2 dm, lengths 2–3 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.

not in ranks, ternate, 1–5(–9) cm;

stipules: apex acute to obtuse;

petiole 1–4 cm, long hairs absent or sparse to common, spreading to ascending, 0.5–2 mm, ± weak, glands sparse to abundant;

leaflets 3, central flabellate, 0.4–2 × 0.5–1.5 cm, petiolule 1–3 mm, margins flat, distal 3/4+ deeply 3–5-lobed (sinuses extending 1/2 to nearly to midvein), lobes unevenly incised 1/4–1/2 to midvein, teeth 2–5 per lobe, surfaces similar, dark green, hairs ± sparse, 0.5–1.5 mm, glands sparse to abundant.

2–4.

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

1–7-flowered.

0.2–0.8 cm (proximal to 2 cm).

straight, 0.2–1.2(–2) cm, not much longer in fruit than in flower.

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 broadly ovate, 2–4 × 2 mm, margins flat;

hypanthium 3.5–6 mm diam.;

sepals 3–5 mm, apex broadly acute to obtuse;

petals yellow, 3–5.5 × 4–5 mm;

filaments 0.7–1.7 mm, anthers 0.5–0.6 mm;

carpels 25–40, styles tapered-filiform, ± papillate-swollen in proximal 1/5–/1/3, 1.3–2 mm.

1–1.2 mm, smooth to faintly rugose.

1–1.5 mm, dorsally crested.

= 56.

= 42.