Flora of North America species comparison

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

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

glabrous or sparsely hairy;

basal and proximal blades spatulate, entire;

mid and distal blades ovate to oblanceolate to oblong-elliptic, entire.

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.

10–30(–50) cm, usually densely hairy (tomentose near involucres).

10–30 cm, sparsely hairy.

depressed hemispheric to globoid, 14–24 × 18–34 mm.

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

15–30, pistillate, fertile;

corollas yellow, (12–)16–28(–37) × 6–13(–25) mm.

13–30, neuter;

corollas yellow, 14–25 × 4–10 mm.

300–750(–1000+);

corollas yellow proximally, yellow to brown to purple distally, 4–5(–5.2) mm, lobes 5.

250–650(–1000+);

corollas yellow, 4.3–5.4 mm, lobes 5.

(connate proximally) usually tomentose.

sparsely to moderately hairy.

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

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

1.5–2.5 mm, moderately to densely hairy;

pappi of 6–8 entire, aristate scales (2.5–)3–4.5 mm.

1.2–1.5 mm, moderately hairy;

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

= 32.

= 32.