Flora of North America species comparison

ascending to erect, 1–4 dm, hairs ± spreading.

decumbent to nearly erect, 0.5–4(–7) dm, hairs 1–3 mm proximally, glands absent or sparse distally.

weakly planar to ± cylindric, 5–15(–20) × 0.5–1.5 cm;

stipules entire;

leaflets 8–16(–20) per side, ± overlapping especially distally, cuneate to flabellate, 3–10 × 2–10 mm, 1/2 to nearly as wide as long, divided 1/2–3/4+ to midrib into 3–8 linear to narrowly oblanceolate or narrowly elliptic lobes, sparsely villous at least marginally, often with a tuft of hairs apically.

planar, 3–12 × 1–3(–4) cm, usually sericeous to villous, sometimes glabrate adaxially;

stipules entire or rarely forked or pectinate;

leaflets 2–5(or 6) per side, separate to slightly overlapping, elliptic to cuneate-oblong, (3–)5–20(–30) × 1.5–7(–10) mm, (1/4–)1/3–1/2 as wide as long, divided 1/10–1/6 or less to midrib into (0–)3(or 4) triangular teeth 1 mm wide, these restricted to apex.

2–5.

1–5;

stipules 3–12 mm, entire or deeply 3–5-lobed, lanceolate to ovate.

open to congested, flowers arranged individually and in glomerules, these sometimes subcapitate.

open to congested, flowers arranged in ± capitate glomerules or in ± corymbiform clusters.

1–6 mm.

(1–)2–6(–10) mm.

10 mm diam.;

epicalyx bractlets narrowly to broadly lanceolate, 1–3 × 0.5–1 mm, slightly shorter than sepals, entire;

hypanthium 1–1.2 × 2.5–4.5 mm, less than 1/2 as deep as wide, interior pilose;

sepals spreading to reflexed, lanceolate, 3–5 mm;

petals oblanceolate, 2.5–4.5 × 1.5 mm, apex emarginate;

filaments (1–)1.5–2 × 0.5 mm, anthers 0.4–0.6 mm;

carpels 10–25;

styles 1.8–2.2 mm.

4–10 mm diam.;

epicalyx bractlets linear to narrowly elliptic, 0.8–2(–3) × 0.2–0.4 mm, 1/2–2/3 length of sepals;

hypanthium 1–2.5 × 2–5 mm, 1/2 to nearly as deep as wide, interior glabrous or pilose;

sepals moderately reflexed, abaxially green to reddish, 1.5–3 mm;

petals white, sometimes tinged with pink, linear to broadly oblanceolate, (1–)1.5–4(–4.5) × 0.3–1.5 mm, apex acute to rounded or mucronate;

filaments 0.5–2 × 0.1–0.4(–0.8) mm, anthers 0.2–0.5 mm;

carpels 5–15;

styles 1–2.5 mm.

light brown, 1.5 mm, smooth or slightly rugose.

light brown, 1.5–2.5 mm, rugose.

= 28.