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.

mostly unbranched, 20–150 cm, faces strongly unequal, 1 pair of opposite faces rounded to convex, the other narrower, flat or concave, internodes and nodes hirsute to hirsute-villous or hispid-villous, hairs minutely 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.

petiole 0.5–1.5 mm;

blade ovate to lanceolate-ovate, lanceolate, or elliptic, 3–7 cm × (5–)7–12(–15) mm, margins finely to coarsely serrate, surfaces 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, 10–15(–20) mm, glabrous or glabrate, except calyx rims and lobes hirsute-villous, hairs minutely gland-tipped;

calyx lobes narrowly triangular, apices acute to acuminate;

petals spreading, dull lavender, 2–2.5 cm;

anthers curved, 8–11 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 concentric rows of contiguous, dome-shaped, sometimes laterally flattened processes, with sculpturing most prominent toward crest.

= 44.

= 44, 66.