Flora of North America species comparison

(0.3–)2–4(–5) dm, lengths (1–)2–4 times basal leaves.

(0.4–)0.6–1.1 dm, lengths 2–3 times basal leaves.

pinnate to subpinnate, (3–)5–15(–25) cm;

petiole 1–10(–15) cm, long hairs abundant to dense, tightly appressed, 1–2.5 mm, stiff, short hairs absent or obscured, crisped-cottony hairs absent or sparse to common, glands absent or obscured;

leaflets not conduplicate, lateral ones evenly (to unevenly in argyrea phase) paired, (2–)3–6(–7) per side on distal (1/6–)1/5–1/2 of leaf axis, distal pairs ± decurrent, often confluent with terminal leaflet, larger leaflets oblanceolate or narrowly obovate to oblong, 1–5(–6) × 0.3–1.5 cm, distal (2/3–)3/4 to whole margin incised 1/2 or less (rarely more) to midvein, teeth (5–)7–12(–18) per side, 1–4 mm, surfaces ± to strongly dissimilar, abaxial white, long hairs abundant (mostly on, but not limited to, veins), 1–2 mm, stiff, short hairs absent or obscured, crisped-cottony hairs abundant to dense, glands absent or obscured, adaxial green to grayish, long hairs sparse to common, rarely absent, short or crisped to, sometimes, cottony hairs absent or sparse to common, glands sparse.

subpinnate, 1 pair of leaflets separate from terminal leaflets, distal leaflets distinct, 1.5–5 cm;

petiole 0.5–3(–4) cm, straight hairs abundant, loosely appressed to ascending, 1–2 mm, stiff, cottony hairs absent, glands sparse to abundant;

leaflets 5, on distal (1/10–)1/5–1/4 of leaf axis, separate, proximal pair separated from others by 1–3 mm of leaf axis, central leaflets narrowly cuneate to oblanceolate, 0.5–1.5 × 0.3–0.6 cm, petiolules 1 mm, distal 1/4(–1/3) or less of margins incised 1/2 or less to midvein, teeth (0–)1(–2) per side, ± separate, 1 mm, surfaces ± dissimilar, abaxial grayish to white, straight hairs ± abundant, appressed, 1–1.5 mm, ± stiff, cottony hairs abundant to sparse, glands ± sparse or obscured, adaxial greenish, straight hairs abundant, ± appressed, 1–1.5(–2) mm, stiff, cottony hairs absent, glands sparse to abundant.

1–2(–3).

10–30-flowered.

solitary flowers or 2–3-flowered.

0.3–3(–5) cm.

(1–)1.5–3 cm.

epicalyx bractlets narrowly elliptic to lanceolate, rarely linear, 2–5 × 0.5–1.5 mm, (1/2–)2/3 as long as sepals, abaxial vestiture similar to or ± sparser than sepals, usually not glabrescent, straight hairs ± abundant, crisped to sometimes ± cottony hairs absent or sparse to abundant;

hypanthium 3–7 mm diam.;

sepals 4–5.5(–6.5) mm, apex acute to acuminate;

petals 4–8 × 4–7 mm;

filaments 0.5–2.5 mm, anthers 0.6–1.1 mm;

carpels (5–)10–30, styles 1.7–2.5 mm.

epicalyx bractlets lanceolate-elliptic to ovate, 2–4 × 0.8–1.5 mm;

hypanthium 3–5 mm diam.;

sepals 3–5(–6) mm, apex ± acute;

petals (4–)5–6.5 × 4–5.5 mm;

filaments 1.5–2.5 mm, anthers 0.7–1 mm;

carpels 10–30, styles 2–2.5 mm.

1.4–1.8 mm, smooth to faintly rugose.

1.5–2 mm, smooth to faintly rugose.

= 42, 70, 77, 84, 98.