Flora of North America species comparison

1(–10), erect, simple or branched distally (usually ± winged by decurrent leaf bases), glabrous or sparsely to densely hairy.

usually mostly cauline; mostly alternate (proximal sometimes opposite);

petiolate or sessile;

blades mostly elliptic, lanceolate, linear, oblanceolate, oblong, ovate, or spatulate, often pinnately lobed or pinnatifid, ultimate margins entire or toothed, faces glabrous or sparsely to densely hairy, gland-dotted.

± globose, hemispheric, obconic, or ovoid, 4–34 mm diam.

conic, ± globose, hemispheric, or ovoid, pitted (glabrous), epaleate (rarely bearing setiform enations).

0 or 7–34, pistillate and fertile or neuter;

corollas yellow, yellow with purple streaks, reddish brown to red proximally and yellow distally, or reddish brown to red or purple throughout.

75–1000+, bisexual, fertile;

corollas yellow, purple, or yellow to yellow-green proximally and yellow-brown, brown or reddish brown to purple distally, tubes shorter than throats, lobes 4 or 5, ± deltate (style-branch apices penicillate or truncate).

persistent, 9–34(–40+) in (1–)2[–3] series (distinct or proximally connate, usually reflexed in fruit, glabrous or sparsely to densely hairy, gland-dotted).

radiate or discoid, borne singly or (2–300+) in paniculiform to corymbiform arrays.

mostly obpyramidal, 4–5-angled, glabrous or sparsely to densely hairy;

pappi persistent, of 5–12 entire or ± lacerate, sometimes aristate scales.

= 17.