Flora of North America species comparison

ascending to erect, 1–3(–3.5) dm.

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

4–10(–12) × 1–2 cm;

leaflets 3–6(or 7) per side, narrowly obovate, 5–12(–15) × 4–8(–10) mm, 1/2–3/4 as wide as long, divided ± 1/4 to midrib into 5–10 oblong to broadly obovate teeth, sparsely pilose especially on midveins and margins.

± 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.

1–4.

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.

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

(3–)5–15 mm.

1–3(–6) mm.

15 mm diam.;

epicalyx bractlets linear-lanceolate to narrowly elliptic, 2–5 × 0.5–1.5 mm, ± 2/3 length of sepals;

hypanthium 0.6–1 × 2.5–4 mm, less than 1/3 as deep as wide;

sepals ± spreading to reflexed, lanceolate to narrowly elliptic, 3.5–6 mm;

petals elliptic to obovate, 4–7 × 3 mm, apex obtuse to rounded to truncate or slightly emarginate;

filaments 1–3 × 0.6–1.3 mm, anthers 0.6–1 mm;

carpels (17–)20–50;

styles 1.5–2.5 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.

grayish, 1.3–1.5 mm, finely reticulate.

brown, 1.6–2.2 mm, faintly rugose.

= 28.