Flora of North America species comparison

ascending to erect, 1.5–5 dm, hairs 2–3 mm proximally, glands dense distally.

ascending to erect, (0.9–)1.5–5 dm, hairs 1 mm proximally, glands absent or sparse distally.

± planar, (3–)4–15 × 1–3 cm, usually villous at least abaxially, often densely so;

stipules entire, deeply 2-lobed, or pinnately divided into 3–5 linear lobes;

leaflets 2–6 per side, ± separate, narrowly cuneate or lanceolate-elliptic to oblong, 5–20 × (1–)2–5(–6) mm, 1/5–1/2 as wide as long, divided 1/6–1/4 or less to midrib into (0–)3(–5) ± ovate teeth 1–2 mm wide, these restricted to apex.

± cylindric to weakly planar, 5–15 × 0.5–1.8(–2.5) cm, usually villous to pilose at least marginally, often glabrescent;

stipules deeply 2-lobed or pinnately divided into 3–5 linear to filiform lobes that often form a tangled mass;

leaflets 10–15 per side, ± overlapping, elliptic to flabellate, (3–)4–10(–15) × 2–8 mm, 1/2 to as wide as long, divided 1/2–3/4 to midrib into (0–)2–4 elliptic to linear lobes 1–2 mm wide, these not restricted to apex.

2–7;

stipules 5–25(–30) mm, divided 3/4+ into linear or linear-lanceolate lobes, or incompletely divided or divided no more than 2/3 into lanceolate, often acuminate teeth.

(2 or)3–5;

stipules 5–12(–15) mm, entire to deeply 2–4-lobed or -toothed (usually on 1 side).

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

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

1–3(–6) mm.

1–6(–12) mm.

8–16 mm diam.;

epicalyx bractlets linear to lanceolate or narrowly elliptic, 1–3 × 0.3–0.8 mm, ± 2/3 length of sepals;

hypanthium 2–2.5 × 3–4.5 mm, ± 1/2 to nearly as deep as wide, interior usually glabrous, sometimes sparsely pilose;

sepals spreading, abaxially green, 2–4.5 mm;

petals white to cream, ± obovate, (2.5–)3–6 × (1.5–)2–5 mm, apex ± rounded to ± emarginate;

filaments (0.5–)1–2 × (0.2–)0.4–0.6 mm, anthers 0.4–0.7(–1) mm;

carpels (6–)10–15(–20), styles 1.5–3 mm.

10 mm diam.;

epicalyx bractlets linear-lanceolate, 1–3 × 0.5 mm, ± 2/3 length of sepals;

hypanthium 1.1–1.5 × 2–3 mm, ± 1/2 to as deep as wide, interior glabrous;

sepals spreading to reflexed, abaxially green to reddish or purplish, 2.5–4.5 mm;

petals white to pink or red-veined, narrowly obcordate, 3–5 × 2–3 mm, apex truncate or emarginate;

filaments 0.5–1.7 × 0.2–0.5 mm, anthers 0.4–0.6 mm;

carpels 2–6;

styles 1.5–2 mm.

brown, 1.6–2.2 mm, faintly rugose.

brown, 2–2.7 mm, smooth.