Flora of North America species comparison

short.

elongate.

± tufted, (2–)2.5–6(–8) dm;

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

openly tufted to loosely spaced, (0.3–)0.6–4 dm;

base 1–3 mm diam., ± densely septate-glandular.

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.

glabrate or sparsely to ± densely hairy;

basal (2–)3–16 cm, leaflet pairs (2–)3–4(–5);

terminal leaflet broadly obovate-cuneate to flabellate, 0.2–3(–4) × 0.5–3 cm, teeth single or double, 2–15 per side, apex usually rounded to truncate, sometimes obtuse;

cauline 0–2, reduced, leaflet pairs 2–3.

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

2–40-flowered, not or ± leafy, open, 1/6–3/4(–4/5) of stem, ± wide, branch angles (10–)20–40(–50)°.

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

3–20 (proximal to 40) mm, not or sparsely to moderately short-hairy, predominantly septate-glandular.

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.

opening widely;

epicalyx bractlets linear to elliptic, 2–6 × 1–2 mm;

sepals spreading, 4–7(–9) mm, apex acute to obtuse, apiculate;

petals overlapping or not, spreading, cream-white to pale yellow (red-tinged in var. crumiana), narrowly to broadly obovate, 4–12 × 3–11 mm, longer than sepals;

filaments 1–4 mm, anthers 0.7–1.2 mm;

styles thickened, 1–1.5 mm.

brown to reddish, 1.2 mm.

light brown, 1 mm.