Flora of North America species comparison

erect, 0.1–0.5 dm, lengths 1–2 times 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, 0.5–2.5(–4) cm;

stipules: apex acute to obtuse;

petiole 0.2–1.8(–2.5) cm, long hairs ± sparse, ± spreading, 0.2–1 mm, weak, glands sparse to abundant;

leaflets 3, central obtriangular to flabellate, 0.5–0.7(–1) × 0.5–0.7 cm, petiolule 0–0.5 mm, margins flat, distal 3/4+ deeply 3–5-lobed (sinuses extending 2/3–3/4 to midvein), lobes unevenly incised 1/4–1/2 to midvein, teeth 1–3(–5) per lobe, surfaces similar, green, brownish, or reddish, hairs absent or sparse, 0.2–0.5 mm, glands sparse to common (also densely punctate-glandular).

1-flowered.

straight or ± curved, 0–0.5(–2) 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 linear, elliptic, or obovate, 2–2.2 × 0.8–1.1 mm, margins flat;

hypanthium 2.5–3.5 mm diam.;

sepals 2.2–2.5 mm, apex broadly acute to obtuse;

petals pale yellow, 3–3.5 × 3–3.5 mm;

filaments 1–1.5 mm, anthers 0.3–0.4 mm;

carpels 20–25, styles ± columnar, not papillate-swollen proximally, 0.7–0.9 mm.

0.9–1.2 mm.

1.2 mm.

= 14, 28 (Russian Far East).