Flora of North America species comparison

ascending to erect, 0.1–0.5(–0.7) dm, lengths 1–2 times basal leaves.

petiole 1–3.5 cm, long hairs ± abundant, 0.5–1.5 mm, short hairs absent or sparse, rarely common;

leaflets 0.2–1 cm, lobes oblanceolate to narrowly elliptic, (0.5–)1–2 mm wide, longs hairs ± abundant, short hairs absent or sparse, glands sparse to abundant.

not in ranks, ternate, 1–5 cm;

stipules: apex acute;

petiole 0.5–3.5 cm, long hairs sparse to abundant, ascending to spreading, 0.5–2 mm, ± soft, glands sparse to common;

leaflets 3, central obovate, 0.5–2 × 0.5–1 cm, petiolule 0–1 mm, margins revolute, not lobed, distal 1/2–2/3 evenly incised ± 1/2 to midvein, teeth 3–4(–6) per side, surfaces ± similar, green (paler abaxially), hairs sparse to abundant, 0.8–1.2 mm, glands sparse to common.

1(–2)-flowered.

straight, 0.2–1.5 cm in flower, to 5 cm in fruit.

epicalyx bractlets broadly lanceolate to elliptic, 1.5–4(–5) × (0.4–)0.8–1.3 mm;

sepals 2–4(–5) mm, apex ± acute;

petals (3–)4–6 × (2–)3–5 mm;

filaments 1–2(–2.5) mm, anthers 0.4–0.6 mm;

carpels 20–50.

epicalyx bractlets oblong or ovate, 2.5–5 × 1.5–3.5 mm, margins revolute;

hypanthium 3–3.5 mm diam.;

sepals 2.5–5 mm, apex ± acute;

petals pale yellow, 4–8 × 4–6 mm;

filaments 1.2–2 mm, anthers 0.3–0.4 mm;

carpels 40–50, styles ± columnar, not or scarcely papillate-swollen proximally, 0.8–1.2 mm.

0.9–1.2 mm.

1.4–1.6 mm.