Flora of North America species comparison

decumbent or ascending to erect, (0.5–)1–10(–12) dm.

ascending to erect, (0.5–)2–6(–7) dm, hairs spreading.

usually planar, sometimes ± cylindric;

stipules usually entire, sometimes basally lobed;

leaflets (1–)3–16(–20) per side, separate to overlapping, divided ± 1/6–3/4+ to midrib into 3–30(–60) teeth or lobes not restricted to apex.

± planar, (3–)6–20(–32) × 0.5–1.5(–2) cm;

stipules entire;

leaflets 7–16 per side, separate to ± overlapping especially distally, broadly cuneate to nearly round, (3–)4–15(–17) × (2–)5–12 mm, 3/4 to nearly as wide as long, divided 1/5–1/2 to midrib into (3–)8–15(–30) acute to obtuse teeth, often medially notched as well 1/3–2/3 to midrib, villous.

3–5.

open to congested, flowers arranged individually, in usually non-capitate glomerules, and/or in corymbiform clusters.

open, flowers arranged individually and in glomerules.

remaining straight, 1–30(–40) mm.

1–7(–20) mm.

epicalyx bractlets narrowly elliptic-lanceolate to broadly ovate, 0.5–3 mm wide, usually entire, sometimes toothed;

hypanthium interior pilose or glabrous;

sepals acute;

petals white, oblong-oblanceolate to round, apex obtuse to truncate to emarginate;

filaments white, glabrous, anthers longer than wide;

carpels 10–200(–220).

8–12 mm diam.;

epicalyx bractlets lanceolate to ovate, 1.5–4.5 × 1–2(–2.5) mm, 1/2–3/4 length of sepals, entire;

hypanthium 1.5–3 × 3–6.5 mm, less than 1/2 as deep as wide, interior sparsely pilose;

sepals spreading to ± reflexed, lanceolate, (3–)4–6.5 mm;

petals broadly oblanceolate-elliptic, 3–5.5 × 2–3 mm, apex truncate;

filaments 1–2 × 0.5–1 mm, anthers 0.8–1.2 mm;

carpels 20–60;

styles 2.5–3 mm.

0.8–2 mm, usually smooth or slightly rugose, sometimes merely roughened.

brown, 1.5 mm, smooth.