Flora of North America species comparison

greenish, much branched, strigillose.

greenish to gray, much branched, pilose.

blades 1- or 3-nerved (some larger leaves), linear, 10–30 × 2–3 mm, strigose to scabrous.

blades 1-nerved, linear to acerose, 8–20 × 1–2 mm, scabrous to glabrescent.

to 11 mm.

5–35 mm.

narrowly campanulate to cylindric, 5–8 × 5–8 mm.

campanulate, 3–5 × 5–7 mm.

3–6;

corollas bright yellow, laminae ovate to orbiculate, mostly 10–18 mm.

4–7;

corollas usually white, sometimes pale yellow, laminae oblong to suborbiculate, 7–10 mm.

18–24;

corollas red or green, to 10 mm, lobes 1 mm.

8–13;

corollas yellow or tinged with purple (drying reddish), 3–6 mm, lobes 1 mm.

oblong, often becoming scarious, glabrous or appressed-hairy distally, apices obtuse, erose-ciliate (red-tipped).

suborbiculate to oblong, becoming scarious proximally, appressed-hairy distally, apices obtuse, ciliate.

4–5 mm, 3-angled (ray) or angular or compressed (disc), ribbed, scabrellous;

pappi 0 or of (1–)2(–4) unequal awns.

2.4–4 mm, 3-angled (ray) or compressed (disc), ribbed, strigose or distally ciliate;

pappi usually of 1–3 unequal awns, sometimes reduced to teeth.

yellowish (often red-tipped), apices obtuse, erose.

uniformly yellow, apices obtuse, erose.

= 42.

= 20, 40, or 22.