Flora of North America species comparison

ascending to erect, 1–3(–4.5) dm, hairs ascending to appressed.

ascending to erect, 1.5–4.5 dm, hairs 1 mm proximally, glands absent or sparse distally.

± planar, 3–8(–9) × 0.7–1.5 cm;

stipules entire;

leaflets 6–9 per side, separate to ± overlapping at least distally, ± cuneate to obovate, 4–10 × 2–7 mm, 1/2 to nearly as wide as long, divided 1/3 to midrib into 3–6 acute, sometimes obtuse, teeth, densely strigulose, often villous marginally or at least apically.

± cylindric to weakly planar, 3–10 × 0.3–1.2 cm, densely sericeous, often villous on margins apically;

stipules usually entire or forked, rarely pinnately divided into linear lobes;

leaflets (8–)10–20 per side, ± overlapping, elliptic to flabellate, 2–8 × 1–4 mm, 1/2–2/3 as wide as long, divided ± 1/2+ to midrib into (0–)2–4 elliptic lobes 1–2 mm wide, these not restricted to apex.

(2 or)3–6.

(2 or)3–5;

stipules 3–8 mm, entire or shallowly 1–2-toothed.

± congested to open, most flowers arranged in glomerules.

open, flowers arranged individually and/or in non-capitate glomerules.

(1–)2–4(–6) mm.

1–4 mm.

10 mm diam.;

epicalyx bractlets elliptic-lanceolate, (1.5–)1.8–3 × 0.5–1 mm, ± 2/3 length of sepals, entire;

hypanthium 1–1.5 × 2–4 mm, less than 1/2 as deep as wide, interior slightly pilose;

sepals spreading to ± reflexed, lanceolate, (2.5–)3–4 mm;

petals oblong to oblanceolate, 3–5.5 × 1.5–2 mm, apex rounded to slightly emarginate;

filaments 0.5–2 × 0.3–0.4 mm, anthers (0.4–)0.5–0.8 mm;

carpels 10–20(–27);

styles (1–)1.5–2 mm.

10 mm diam.;

epicalyx bractlets linear-lanceolate, 1.5–3 × 0.5 mm, ± 2/3 length of sepals;

hypanthium 1–1.5 × 2–3 mm, ± 1/2 to as deep as wide, interior glabrous;

sepals spreading to reflexed, abaxially green to reddish or purplish, 2–4 mm;

petals white to pink or red-veined, narrowly obcordate, 3–4.5(–7) × 2–3 mm, apex ± emarginate;

filaments 0.5–1.5 × 0.2–0.5 mm, anthers 0.4–0.6 mm;

carpels 2–6;

styles 1.5–2 mm.

brown to dark brown, 1–1.3 mm, usually faintly roughened.

brown, 2–2.5 mm, smooth.

= 28.