Flora of North America species comparison

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

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

glabrous or sparsely hairy;

basal and proximal blades spatulate, entire;

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

glabrous or sparsely hairy;

basal blades oblanceolate to spatulate, entire or undulate to undulate-serrate;

proximal and mid blades oblanceolate to lanceolate, usually entire, sometimes undulate to undulate-serrate;

distal blades lance-linear, entire.

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

(3–)6–11(–15) cm, sparsely to moderately hairy.

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

hemispheric to globoid, 10–15 × 10–20 mm.

15–30, pistillate, fertile;

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

9–24, neuter;

corollas yellow, 12.5–21 × 4–8 mm.

300–750(–1000+);

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

200–500(–800+);

corollas yellow proximally, usually purple to yellow or yellow-brown distally, 4–5.6 mm, lobes 5.

(connate proximally) usually tomentose.

(connate proximally) sparsely to moderately hairy.

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

1–10 per plant, borne singly or in paniculiform to corymbiform arrays.

1.5–2.5 mm, moderately to densely hairy;

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

1–1.4 mm, sparsely to moderately hairy;

pappi of 6–8 entire, non-aristate scales 1–1.7 mm.

= 32.

= 26, 28.