Flora of North America species comparison

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

1(2–10), branched distally, moderately to strongly winged, glabrous or sparsely hairy.

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.

glabrous or sparsely to moderately hairy (basal withered by flowering);

proximal and mid blades narrowly elliptic to narrowly oblong-elliptic, usually serrate to undulate-serrate, sometimes deeply toothed or laciniate;

distal blades narrowly elliptic to narrowly oblong-elliptic, serrate to undulate-serrate.

3–10 cm, moderately to densely hairy.

1.8–8 cm, moderately hairy.

globoid, 8–20 × 8–23 mm.

globoid to usually ovoid, 4–12 × 4–12 mm.

8–21, pistillate, fertile;

corollas yellow, 10–23 × 4–10 mm.

7–13, pistillate, fertile;

corollas usually yellow throughout, sometimes reddish proximally and yellow distally, 2.6–9.1 × 1.5–6.7 mm.

200–400(–800+);

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

120–400+;

corollas yellow to yellow-green proximally, brown to reddish brown distally, 1.2–2.4 mm, lobes (4–)5.

(connate proximally) moderately to densely hairy.

(connate proximally) moderately hairy.

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

20–300+ per plant, in paniculiform arrays.

1–2 mm, sparsely to moderately hairy;

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

0.7–1.4 mm, moderately hairy;

pappi of usually 6 entire, non-aristate scales (0.2–)0.3–0.7 mm.

= 32, 34, 36.