Flora of North America species comparison

1(–7), branched distally, strongly winged, sparsely to densely hairy proximally, moderately to densely hairy distally.

usually 1, sparingly branched distally, weakly winged, glabrous or sparsely hairy.

usually moderately to densely hairy, sometimes glabrous;

basal blades (withered by flowering) lanceolate, oblanceolate, or obovate, entire or weakly lobed;

proximal and mid blades obovate to oblanceolate, usually dentate or entire;

distal blades oblanceolate to lanceolate, entire or dentate.

glabrous or sparsely hairy;

blades all lance-linear, entire or coarsely toothed.

3–10 cm, moderately to densely hairy.

4–13 cm, glabrous or sparsely to moderately hairy.

globoid, 8–20 × 8–23 mm.

globoid to ovoid, 11–16 × 14–20 mm.

8–21, pistillate, fertile;

corollas yellow, 10–23 × 4–10 mm.

12–18, pistillate, fertile;

corollas usually yellow, sometimes yellow with purple streaks, 10–20 × 5–13 mm.

200–400(–800+);

corollas yellow proximally, yellow to yellow-brown distally, 2.4–4 mm, lobes 5.

300–500(–700+);

corollas yellow proximally, yellow to purple to dark blue-purple distally, 3.2–3.6 mm, lobes 5.

(connate proximally) moderately to densely hairy.

sparsely to densely hairy.

5–70(–100+) per plant, in paniculiform arrays.

1–15(–25) per plant, in paniculiform arrays.

1–2 mm, sparsely to moderately hairy;

pappi of 5–7 entire, aristate scales (0.5–)0.9–1.5(–1.8) mm.

2–2.9 mm, moderately hairy;

pappi of 6–7 entire, aristate scales 1.5–2 mm.

= 32, 34, 36.

= 30.