Flora of North America species comparison

developed;

roots short, fibrous, lignescent, non-tuberiferous.

not developed;

roots often long and rhizomelike, lignescent, non-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- to several-branched distally, 40–60 cm, faces subequal, angles sharp, without wings or very 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, subsessile, or petiole 0.5–1.5 mm;

blade narrowly to broadly elliptic, 2–6(–7) cm × 10–25 mm, margins serrate to serrulate, surfaces loosely strigose to strigose-hirsute or 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 to subglobose, about as long as the constricted neck, 6–10 mm, hirsute-villous, glabrous, or glabrate, hairs gland-tipped;

calyx lobes narrowly triangular, apices acute to acuminate, narrowed to linear-oblong extensions;

petals spreading, bright lavender-rose, 1.2–1.5 cm;

anthers curved, 5–8 mm.

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

0.5–0.7 mm, surfaces irregularly ridged in concentric rows or with laterally flattened, domelike processes.

= 44.

= 44.