Flora of North America species comparison

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

prostrate to ascending, (0.3–)0.8–2(–3.5) dm, lengths (1–)1.5–3 times basal leaves.

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

pinnate with distal leaflets ± distinct, (1.5–)2–10(–13) × 0.7–3.5(–5) cm;

petiole 0.5–3.5(–5) cm, straight hairs sparse to abundant, sometimes absent (var. decurrens), ± appressed to ascending, 1 mm, ± stiff, cottony hairs absent, glands sparse, often obscured;

primary lateral leaflets 3–6 per side (often with additional interspersed leaflets), on distal 1/2–2/3(–3/4) of leaf axis, ± separate to ± overlapping, largest ones narrowly cuneate-oblanceolate to ± obovate, (0.3–)0.5–2(–3.5) × (0.2–)0.3–0.8(–1) cm, distal 1/4 to whole margin unevenly to pinnately (at least distal leaflets of var. ovina) incised 1/2–3/4+ to midvein, ultimate teeth 2–9(–11), linear or oblong to ovate, 1–7(–9) × 1–2 mm, apical tufts 0.5–2 mm, surfaces green to grayish, not glaucous, straight hairs sparse to abundant (sparser adaxially), sometimes absent (except on margins), loosely appressed, 0.5–2 mm, ± stiff, cottony hairs absent, crisped hairs sometimes sparse to common, glands absent or inconspicuous.

(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.

1–2.

(0–)1(–2).

(1–)2–11(–20)-flowered, usually openly cymose.

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

(0.8–)1–2(–4) cm, straight to ± recurved in fruit.

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

epicalyx bractlets linear-lanceolate to narrowly elliptic, sometimes doubled, 2–3.5(–5) × 1 mm;

hypanthium 3–5 mm diam.;

sepals 3.5–5.5(–7) mm, apex acute to obtuse;

petals 4–7(–8) × 3.5–8 mm;

filaments 1–2.5 mm, anthers 0.4–1 mm usually ± 1/2 as long as filaments;

carpels 10–20, styles 2–3 mm.

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.

1.5–2 mm, smooth, not carunculate.

1.2–2 mm.

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