Flora of North America species comparison

stout, usually columnar, sometimes sheathed with marcescent whole leaves.

erect, (0.2–)0.3–1.5(–2) dm, lengths 1.5–2.5(–3.5) times basal leaves.

erect, 0.1–0.5 dm, lengths 1–2 times leaves.

(1–)2–10(–15) cm;

petiole (0.5–)1–5(–12) cm, long hairs common to dense, ± ascending to loosely appressed, sometimes spreading, 1–2 mm, ± soft, smooth, crisped/short-cottony hairs usually sparse, sometimes absent or common, glands absent, sparse, or obscured;

leaflets separate to slightly overlapping, central obovate or obtriangular, (0.5–)1–2(–3) × (0.4–)0.8–1.5(–2) cm, sessile or subsessile, base cuneate, margins revolute, distal (1/3–)1/2–2/3(–3/4) incised 1/2–2/3(–3/4) to midvein, teeth 2–3(–4) per side, usually ± distant, surfaces somewhat to more often strongly dissimilar, abaxial yellowish or grayish white to white, long hairs 0.8–1.5 mm, cottony-crisped hairs ± dense, adaxial green to grayish green, long hairs sparse to ± abundant, other hairs usually absent.

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).

(0–)1(–2).

usually 1(–2)-flowered, rarely to 5-flowered.

1-flowered.

(0.5–)2–4 cm in flower, to 5 cm in fruit.

straight or ± curved, 0–0.5(–2) cm in flower, to 5 cm in fruit.

epicalyx bractlets elliptic-lanceolate to ovate, (3–)4–6(–7) × (0.8–)1.2–2(–2.5) mm, (1/2–)2/3 to as wide as sepals, margins revolute, rarely flat, red glands absent;

hypanthium 2.5–4 mm diam.;

sepals 4–6(–7) mm, apex subacute;

petals (5–)6–9 × (5–)7–9 mm, significantly longer than sepals;

filaments 1–1.3 mm, anthers 0.4–0.6 mm;

carpels 30–40, apical hairs absent, styles narrowly columnar to conic-tapered, papillate-swollen on proximal 1/5(–1/3), 0.9–1.1 mm.

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.

1.2–2 mm.

1.2 mm.

= 28, 42, 49, 56 (Russian Far East).

= 14, 28 (Russian Far East).