Flora of North America species comparison

prostrate to ascending, (0.7–)1.5–2.5(–4) dm, lengths 2–4(–5) times basal leaves.

ascending to erect, (0.4–)1–2 dm, lengths 2–4 times basal leaves.

pinnate with distal leaflets ± confluent, 4–12 × 1–2.5(–3.5) cm;

petiole 1–3 cm, straight hairs absent (on early-season petioles) or sparse to common, spreading-ascending to loosely appressed, 1–2 mm, soft, cottony hairs usually absent, glands sparse;

primary lateral leaflets 3–5 per side, on distal (1/3–)1/2–2/3 of leaf axis, overlapping, largest ones cuneate to flabellate, 0.5–1.5(–2) × 0.5–1.5 cm, distal 3/4 to whole margin unevenly incised 2/3 to completely to midvein (blade often medially split as well), ultimate teeth or segments 2–5(–8), ± oblanceolate, 3–11 × 1–3 mm, apical tufts to 1 mm, surfaces green to grayish green, not glaucous, straight hairs sparse to common (sparser adaxially), sometimes absent (except on margins), loosely appressed to ascending, 1–2 mm, soft, cottony hairs absent, glands sparse to common.

not in ranks, ternate, (1–)2–5(–7) cm;

stipules: apex acute to rounded;

petiole 1–4 cm, hairs absent or long hairs sparse to common, appressed, 0.5–1 mm, stiff, glands absent;

leaflets 3, central obovate to flabellate, 1–2.5 × 0.5–2 cm, petiolule (1–)3–10 mm, margins flat, not lobed, distal 1/2–3/4 ± evenly incised 1/4–1/2 to midvein, teeth (2–)3(–4) per side, not secondarily toothed, surfaces similar, green, sometimes ±glaucous, hairs absent or sparse to common, 0.5 mm, glands absent.

1–2(–3).

(1–)3–10-flowered, usually openly cymose.

1–6-flowered.

1–3(–5) cm, straight to slightly recurved in fruit.

straight, 0.5–2 cm in flower, to 5 cm in fruit.

epicalyx bractlets lanceolate to elliptic, rarely ovate, 2–5 × 1–2 mm, sometimes apically toothed;

hypanthium 3–5 mm diam.;

sepals 4–7 mm, apex acute;

petals 4–7 × 3–5.5 mm;

filaments (1–)1.5–2.5 mm, anthers 0.5–0.8 mm;

carpels 10–25, styles 2 mm.

epicalyx bractlets elliptic to oval, 2–4.5 × 1–2 mm, margins flat;

hypanthium 2.5–4 mm diam.;

sepals 3–5.5 mm, apex acute to obtuse;

petals yellow, 4–7 × 4–6 mm;

filaments 1–3 mm, anthers 0.5–0.9 mm;

carpels 10–30, styles filiform, not or slightly papillate-swollen proximally, 1–2.5 mm.

1.5–1.8 mm, smooth to faintly rugose, not carunculate.

1.2–1.5 mm.