Flora of North America species comparison

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

usually 1, branched distally, narrowly winged, sparsely hairy proximally, moderately hairy distally.

glabrous or sparsely hairy;

blades all lance-linear, entire or coarsely toothed.

glabrous or sparsely hairy (basal withered by flowering);

proximal blades lance-linear, usually coarsely or irregularly laciniate;

mid and distal blades lance-linear to linear, entire.

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

2–8 cm, sparsely to moderately hairy.

globoid to ovoid, 11–16 × 14–20 mm.

globose to slightly ovoid, 6–11(–13) × 6–11(–13) mm.

12–18, pistillate, fertile;

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

8–9, pistillate, fertile;

corollas yellow throughout or red proximally and yellow distally or red throughout, 6–12 × 3–8 mm.

300–500(–700+);

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

150–300(–500+);

corollas yellow-green proximally, brown to purple distally, 2.5–3.2 mm, lobes 5.

sparsely to densely hairy.

moderately hairy.

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

5–50(–100+) per plant, in paniculiform arrays.

2–2.9 mm, moderately hairy;

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

1–1.2 mm, moderately hairy;

pappi of 6(–7) entire, aristate scales 2–2.5 mm.

= 30.

= 28.