Flora of North America species comparison

developed;

roots short, fibrous, lignescent, non-tuberiferous.

not developed;

roots often long and rhizomelike, tuberiferous.

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

unbranched or few-branched proximally, 30–60 cm, faces strongly unequal, 1 pair of opposite faces rounded to convex, the other narrower, flat or concave, internodes and nodes sparsely 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 linear or linear-elliptic to oblong or narrowly spatulate, 2–4 cm × 1–4(–8) mm, apparently 1-veined, margins serrate, surfaces sparsely glandular-hirsute.

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 ovoid to subglobose, about as long as the constricted neck, (10–)14–15(–16) mm, sparsely hirsute, hairs gland-tipped;

calyx lobes narrowly triangular to oblong-triangular, apices acute;

petals spreading, bright to pale lavender-rose, 1.5–2 cm;

anthers curved, 7–10 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 concentrically, evenly ridged, especially along crest.

= 44.

= 22, 44, 66.