Flora of North America species comparison

developed;

roots short, fibrous, lignescent, non-tuberiferous.

usually 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.

unbranched to several-branched, 40–70 cm, faces subequal, angles weakly ridged, sometimes narrowly winged, internodes glabrous, nodes sparsely hirsute to villous, hairs yellowish, eglandular.

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 to subsessile;

blade usually lanceolate, 2–3 cm × 3–9 mm, margins shallowly serrate to barely crenulate, apex sometimes minutely apiculate, surfaces glabrous or sparsely long-strigose to ascending-villous.

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, about as long as the constricted neck, 7–10 mm, hispid-hirsute at neck, rim, and calyx lobes, hairs yellowish, eglandular;

calyx lobes triangular, apices acuminate-aristate;

petals spreading, dull lavender, 1–2 cm;

anthers curved, 5–6 mm.

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

ca 0.7 mm, surfaces with irregular, concentric ridges, with few isolated domes or papillae.

= 44.

= 22.