Flora of North America species comparison

short.

short.

usually solitary, sometimes tufted, (1–)3–10 dm;

base 3–6 mm diam., ± densely, sometimes sparsely, septate-glandular.

± tufted, (2–)2.5–6(–8) dm;

base 2–3 mm diam., moderately to densely septate-glandular.

usually moderately to densely hairy;

basal (6–)12–40 cm, leaflet pairs (3–)4–5;

terminal leaflet broadly elliptic-obovate, (2–)4–10 × (1–)2–4.5 cm, teeth mostly double, 15–30+ per side, apex obtuse to acute;

cauline 2–3, relatively well developed, leaflet pairs 2–4.

glabrate or sparsely hairy (hairier at northern margin of range);

basal (8–)20–30 cm, leaflet pairs 2–4;

terminal leaflet ± obovate, 2–6(–7) × (1–)1.5–3 cm, teeth ± double, 5–25 per side, apex obtuse to acute;

cauline 0–2, well developed, leaflet pairs 1–3.

10–40-flowered, not leafy, congested, sometimes more elongate in fruit, 1/10–1/5(–1/3) of stem, narrow, branch angles 5–20°.

(5–)10–30(–60)-flowered, leafy, open, 1/6–2/3 of stem, wide, branch angles (20–)30–60°.

1–5 (proximal to 15) mm, densely short-hairy, septate-glandular.

5–40 (proximal to 45) mm, sparsely to moderately short-hairy, predominantly septate-glandular.

opening widely;

epicalyx bractlets ± elliptic, 4–6(–8) × 1–2 mm;

sepals spreading, (5–)7–10 mm, apex obtuse to acute, apiculate;

petals overlapping, spreading, cream-white to yellowish, broadly elliptic, (5–)7–9 × (5–)6–8 mm, ± equal to or slightly longer than sepals;

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

styles thickened, 1 mm.

opening widely;

epicalyx bractlets linear-oblanceolate, 2–6 × 0.5–1 mm;

sepals spreading, 4–7(–8) mm, apex usually acute, rarely obtuse;

petals ± overlapping, spreading, usually bright, sometimes pale, yellow, broadly obovate to round, 5–12 × (4–)5–11 mm, usually longer, rarely shorter, than sepals;

filaments 1.5–4 mm, anthers 0.7–1 mm;

styles thickened, 1 mm.

light brown, 1 mm.

brown to reddish, 1.2 mm.

= 14.