Flora of North America species comparison

stout, columnar, 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, 0.2–0.6(–1.1) dm, lengths 2–4 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.

0.5–2.5(–3) cm;

petiole 0.3–1.5(–2) cm, long hairs common to abundant, spreading to ascending, 1(–2) mm, ± weak, rarely stiff, smooth, crisped/short-cottony hairs usually absent, sometimes sparse, glands sparse to common;

leaflets separate to slightly overlapping, central obovate, 0.5–1.2(–1.5) × 0.4–0.9(–1) cm, subsessile to short-petiolulate, base cuneate, margins revolute, distal 1/2 incised 1/2–3/4 to midvein, teeth (1–)2–3(–4) per side, ± distant, surfaces ± dissimilar, abaxial grayish or yellowish white, long hairs 0.5–1 mm, cottony-crisped hairs ± dense (often obscured by long hairs), adaxial dark green to greenish gray, long hairs ± abundant, other hairs absent.

1–2.

(0–)1(–2).

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

1(–2)-flowered.

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

1–2(–3) cm in flower, to 5.5 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 lanceolate to elliptic-ovate, rarely linear, 3–6(–7) × 0.8–2(–2.3) mm, (1/2–)2/3 to nearly as wide as sepals, margins flat or ± revolute, red glands absent;

hypanthium 2.5–4 mm diam.;

sepals 3–5(–6) mm, apex obtuse to subacute;

petals 4–8(–9) × 4–9 mm, longer than sepals;

filaments 1–1.3 mm, anthers 0.3–0.5 mm;

carpels 25–35, apical hairs absent, styles conic-columnar, ± papillate-swollen on less than proximal 1/5, 0.9–1.1 mm.

1.5–2 mm, smooth, not carunculate.

1.2–1.6 mm.

= 28 (Russian Far East).