Flora of North America species comparison

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

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

glabrous or sparsely to moderately hairy;

basal blades oblanceolate to obovate or spatulate, entire or serrate;

proximal and mid blades oblanceolate to lanceolate, entire or toothed;

distal blades lanceolate to lance-linear, entire.

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.

3–10 cm, sparsely to moderately hairy.

2–14 cm, moderately to densely hairy.

globoid to usually ovoid, 8–17 × 9–17 mm.

globoid, 5–11 × 5–12(–13) mm.

usually 8–13, neuter, sometimes 0;

corollas yellow to reddish brown to red to purple, 10–20 × 5–10 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.

250–500(–700+);

corollas yellow proximally and purple distally or purple throughout, 2.3–3.7 mm, lobes 4(–5).

150–700+;

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

(connate proximally) moderately to densely hairy.

(connate proximally) moderately to densely hairy.

(1–)5–50(–80+) per plant, in paniculiform arrays.

20–200+ per plant, in paniculiform arrays.

1–1.2 mm, moderately hairy;

pappi of 5–6 entire, aristate scales 0.6–1(–1.7) mm.

0.6–1 mm, moderately hairy;

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

= 28.