Flora of North America species comparison

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

glabrous or sparsely hairy;

blades all lance-linear, entire or coarsely toothed.

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

globoid to ovoid, 11–16 × 14–20 mm.

12–18, pistillate, fertile;

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

300–500(–700+);

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

sparsely to densely hairy.

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

2–2.9 mm, moderately hairy;

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

= 30.