Flora of North America species comparison

usually 1, unbranched or sparingly branched distally, weakly to moderately winged, glabrous proximally, sparsely to moderately hairy distally.

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

glabrous or sparsely hairy;

basal blades oblanceolate to spatulate, entire or undulate to undulate-serrate;

proximal and mid blades oblanceolate to lanceolate, usually entire, sometimes undulate to undulate-serrate;

distal blades lance-linear, entire.

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.

(3–)6–11(–15) cm, sparsely to moderately hairy.

hemispheric to globoid, 10–15 × 10–20 mm.

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

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

9–24, neuter;

corollas yellow, 12.5–21 × 4–8 mm.

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.

200–500(–800+);

corollas yellow proximally, usually purple to yellow or yellow-brown distally, 4–5.6 mm, lobes 5.

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).

(connate proximally) sparsely to moderately hairy.

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).

1–10 per plant, borne singly or in paniculiform to corymbiform arrays.

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

1–1.4 mm, sparsely to moderately hairy;

pappi of 6–8 entire, non-aristate scales 1–1.7 mm.

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

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

= 17.

= 26, 28.