Flora of North America species comparison

short.

(1–)2–7 dm, base 2–5 mm diam.

tufted, (1–)1.5–7.5 dm;

base 1–5 mm diam., moderately to densely septate-glandular.

basal (5–)10–30 cm, leaflet pairs (2–)3–4;

terminal leaflet broadly obovate, (2–)3–7 × 2–5 cm, teeth double, 9–17 per side, apex usually rounded, rarely obtuse;

cauline well developed, leaflet pairs 2–4.

sparsely to moderately hairy;

basal (3–)6–30 cm, leaflet pairs (1–)2–4;

terminal leaflet broadly obovate to rhombic-elliptic, (1–)1.5–7(–8) × 1–5 cm, teeth usually double (irregularly single in var. viscida), (4–)6–18(–20) per side, apex rounded to obtuse;

cauline 0–3, developed or reduced, leaflet pairs 1–4.

(3–)5–30-flowered, ± to very leafy, wide, branch angles (15–)30–55°.

(2–)5–40-flowered, leafy or not, open or of congested clusters terminating branches, (1/10–)1/5–3/4 of stem, usually wide (narrow in var. viscida), branch angles (15–)20–55°.

1–5 (proximal to 30) mm.

1–10 (proximal to 30) mm, not or sparsely short-hairy, predominantly septate-glandular.

epicalyx bractlets ± elliptic, (3–)4–7 × 1.5–2.5(–3) mm;

sepals spreading, 5–11 mm, apex round-obtuse, mucronate;

petals spreading, usually cream-white, sometimes pale yellow, broadly ovate or obovate, (4–)4.5–6.5 × 3–5.5 mm;

filaments 1–2 mm.

opening widely;

epicalyx bractlets linear-lanceolate to elliptic, 1.5–7(–8) × 0.5–2.5(–3) mm;

sepals spreading or reflexed, (3–)4–11 mm, apex usually broadly obtuse with mucronate tip, sometimes acute;

petals not overlapping, spreading or reflexed, cream-white to yellow, narrowly to broadly obovate or ovate to nearly round, 2–6.5 × 1.5–5.5 mm, shorter than or equal to sepals;

filaments 0.5–2 mm, anthers 0.5–1 mm;

styles thickened, 1–1.5 mm.

1.2–1.5 mm.

reddish brown, 0.9–1.5 mm.

= 14.