Flora of North America species comparison

short.

elongate.

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

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

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

base 1–3 mm diam., ± 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 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.

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

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

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

3–20 (proximal to 40) mm, not or 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 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.

light brown, 1 mm.

light brown, 1 mm.

= 14.