Flora of North America species comparison

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

1(–7), branched distally, strongly winged, sparsely to densely hairy proximally, moderately to densely hairy distally.

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.

usually moderately to densely hairy, sometimes glabrous;

basal blades (withered by flowering) lanceolate, oblanceolate, or obovate, entire or weakly lobed;

proximal and mid blades obovate to oblanceolate, usually dentate or entire;

distal blades oblanceolate to lanceolate, entire or dentate.

10–30 cm, sparsely hairy.

3–10 cm, moderately to densely hairy.

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

globoid, 8–20 × 8–23 mm.

13–30, neuter;

corollas yellow, 14–25 × 4–10 mm.

8–21, pistillate, fertile;

corollas yellow, 10–23 × 4–10 mm.

250–650(–1000+);

corollas yellow, 4.3–5.4 mm, lobes 5.

200–400(–800+);

corollas yellow proximally, yellow to yellow-brown distally, 2.4–4 mm, lobes 5.

sparsely to moderately hairy.

(connate proximally) moderately to densely hairy.

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

5–70(–100+) per plant, in paniculiform arrays.

1.2–1.5 mm, moderately hairy;

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

1–2 mm, sparsely to moderately hairy;

pappi of 5–7 entire, aristate scales (0.5–)0.9–1.5(–1.8) mm.

= 32.

= 32, 34, 36.