Flora of North America species comparison

usually not sheathed with marcescent whole leaves.

usually prostrate, sometimes ± decumbent, 0.4–2(–3) dm, lengths 1–2 times basal leaves.

ascending to nearly erect, (0.3–)0.5–1.5(–2.5) dm.

pinnate with distal leaflets ± confluent, 2–15(–20) × 1–3 cm;

petiole 0.5–2(–3) cm, straight hairs sparse to abundant, appressed to spreading, 0.5–1.5 mm, stiff, cottony hairs absent, glands absent or sparse;

primary lateral leaflets (3–)5–13 per side, on distal 2/3–3/4+ of leaf axis, separate to overlapping, largest ones cuneate to flabellate, 0.5–1.5(–2) × 0.5–2 cm, distal 2/3 to whole margin palmately or unevenly, rarely pinnately, incised 2/3 to completely to midvein, ultimate teeth or segments (1–)2–10, linear to broadly oblanceolate, 2–10 × (0.5–)1–2 mm, apical tufts to 1 mm, surfaces green to grayish green, not glaucous, straight hairs sparse to abundant, appressed to spreading, 0.5–1.5(–2) mm, stiff, cottony hairs absent, glands sparse to common.

usually palmate, rarely also ternate on same plant or subpalmate, 2–6(–8) cm;

petiole 0.5–3.5(–5) cm, long hairs common to abundant, ± ascending to almost spreading, 1–2 mm, weak to ± stiff, scarcely to ± verrucose, short and/or crisped hairs common to abundant, cottony hairs absent, glands sparse to common;

leaflets (3–)5, proximalmost separated by 0–1 mm, central obovate to oblanceolate-elliptic, 0.5–2(–2.5) × 0.5–1(–1.5) cm, petiolules 1 mm, distal 3/4 to nearly whole margin incised 1/2–3/4 to midvein, teeth 2–5 per side, (1–)2–5 mm, apical tufts 0.5–1 mm, abaxial surfaces white, long hairs common to abundant, cottony-crisped hairs dense, short hairs and glands absent or obscured, adaxial grayish green, long hairs common to abundant, 0.5–1.5 mm, ± stiff, rarely soft, short and/or crisped hairs sparse to common, cottony hairs absent, glands sparse to common.

(0–)1–2.

1–2.

3–6(–10)-flowered, loosely cymose, sometimes racemiform.

(1–)3–10-flowered, congested or ± elongating in fruit, branch angle 20–35°.

(0.5–)1–2(–4.5) cm, ± recurved in fruit.

0.2–0.5 cm, proximal to 1.2 cm.

epicalyx bractlets ± elliptic, 2–4(–6) × 1–2(–2.5) mm;

hypanthium 3–6 mm diam.;

sepals 4–6(–8) mm, apex acute;

petals 4–8(–10) × 3–7(–9) mm;

filaments 2–3.5 mm, anthers 0.7–1 mm;

carpels 10–30, styles (1.5–)2–3 mm.

epicalyx bractlets narrowly elliptic, 1.5–3 × 0.5–1 mm;

hypanthium 3–4 mm diam.;

sepals 2.5–4 mm, apex ± acute, glands abundant, usually not obscured;

petals yellow, ± overlapping, 3.5–5 × 3–4 mm, slightly longer than sepals;

filaments 1 mm, anthers 0.3–0.7 mm;

carpels 20–40, styles 1 mm.

1.5–2 mm, smooth, often ± carunculate.

1 mm.