Flora of North America species comparison

usually 1, usually unbranched distally, moderately to strongly winged, glabrous proximally, glabrous or sparsely hairy distally.

usually 1, branched distally, moderately to strongly winged, glabrous or sparsely to moderately hairy.

glabrous;

basal blades narrowly obovate to narrowly oblanceolate, usually entire, sometimes undulate-serrate;

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

distal blades lance-linear, usually entire, rarely undulate-serrate.

glabrous or sparsely hairy (basal withered by flowering);

proximal and mid blades lanceolate to narrowly elliptic, entire, serrate, or irregularly toothed or lobed;

distal blades lanceolate to linear, entire.

10–30 cm, sparsely hairy.

2–14 cm, moderately to densely hairy.

hemispheric to globoid, 10–18 × 15–25 mm.

globoid, 5–11 × 5–12(–13) mm.

13–30, neuter;

corollas yellow, 14–25 × 4–10 mm.

10–17, pistillate, fertile;

corollas yellow throughout or red-brown to red proximally and yellow distally, 5.5–15(–19) × 2.2–5.5(–8.7) mm.

250–650(–1000+);

corollas yellow, 4.3–5.4 mm, lobes 5.

150–700+;

corollas yellow proximally, yellow to brown to usually reddish brown distally, 1.5–2.3(–2.5) mm, lobes 5.

sparsely to moderately hairy.

(connate proximally) moderately to densely hairy.

1(–3) per plant, usually borne singly.

20–200+ per plant, in paniculiform arrays.

1.2–1.5 mm, moderately hairy;

pappi of 5–12 deeply lacerate, non-aristate scales 2–3.7 mm.

0.6–1 mm, moderately hairy;

pappi of 6–7 entire, non-aristate scales 0.05–0.3(–0.4) mm.

= 32.