Flora of North America species comparison

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

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

glabrous or sparsely hairy;

blades all lance-linear, entire or coarsely toothed.

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.

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

10–30 cm, sparsely hairy.

globoid to ovoid, 11–16 × 14–20 mm.

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

12–18, pistillate, fertile;

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

13–30, neuter;

corollas yellow, 14–25 × 4–10 mm.

300–500(–700+);

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

250–650(–1000+);

corollas yellow, 4.3–5.4 mm, lobes 5.

sparsely to densely hairy.

sparsely to moderately hairy.

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

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

2–2.9 mm, moderately hairy;

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

1.2–1.5 mm, moderately hairy;

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

= 30.

= 32.