Flora of North America species comparison

developed;

roots short, fibrous, lignescent, non-tuberiferous.

not developed;

roots often long and rhizomelike, lignescent, tuberiferous.

branched proximally, 10–40 cm, faces subequal, flat to convex, 4-angled distally from midstem, internodes and nodes hirsute, hairs eglandular.

usually several-branched distally, 20–55 cm, faces subequal, angles narrowly winged, internodes and nodes hirsute-villous, hairs gland-tipped.

subsessile;

blade spatulate to oblanceolate or elliptic, 2–3 cm × 2–8 mm, 2 lateral veins marginal on narrower leaves, margins subentire to shallowly serrate, surfaces loosely strigose, hairs yellowish.

sessile;

blade narrowly elliptic or narrowly oblong to narrowly oblanceolate or linear, 1.5–4 cm × 1–5 mm, lateral veins relatively short or, in narrower leaves, absent, margins entire or minutely crenulate, ciliate, with gland-tipped hairs, apex sometimes apiculate, surfaces sparsely to moderately hirsute, hairs gland-tipped.

diffuse, not obscured by bracts.

diffuse, not obscured by bracts.

hypanthium globose, much longer than the constricted neck, 6–7 mm, hirsute to villous, eglandular;

calyx lobes triangular, apices aristate;

petals ascending, golden-yellow, 1–1.5 cm;

anthers straight, 2 mm.

hypanthium globose, longer than the constricted neck, (4–)5–7(–8) mm, sparsely hirsute-villous, hairs gland-tipped;

calyx lobes narrowly triangular, apices acute;

petals spreading, pink to lavender-rose or purple, 1.1–1.2 cm;

anthers curved, 4–5 mm.

0.7 mm, surfaces with few straight ridges of papillae along crest, sides with lower, more scattered papillae or ± smooth.

0.7 mm, surfaces with 3–5 prominent, broad, symmetrical or tortuous longitudinal ridges or contiguous, domelike tubercles in rows.

= 44.

= 22.