Flora of North America species comparison

1–3(–10), unbranched or sparingly branched distally, weakly to moderately winged, glabrous proximally, glabrous or sparsely hairy distally.

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

glabrous or sparsely hairy;

basal blades oblanceolate to oblong-elliptic, entire;

proximal and mid blades lanceolate to oblong-elliptic, entire;

distal blades linear to lanceolate, entire.

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.

(6–)10–30 cm, sparsely to moderately hairy.

1.8–8 cm, moderately hairy.

hemispheric to globoid, 12–20 × (14–)17–22(–25) mm.

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

14–20, pistillate, fertile;

corollas yellow, 13–25 × 5–10(–12) mm.

7–13, pistillate, fertile;

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

250–500(–800+);

corollas yellow proximally, yellow to brown to purple distally, 3–4.4(–4.8) 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.

1–20 per plant, borne singly or in paniculiform arrays.

20–300+ per plant, in paniculiform arrays.

1.8–2.4 mm, moderately hairy;

pappi of 6–8 entire, aristate scales 1.3–2.2(–2.7) mm.

0.7–1.4 mm, moderately hairy;

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

= 32.