Flora of North America species comparison

all or mostly alternate (proximal sometimes opposite);

blades lance-ovate or lance-elliptic to lance-linear, 5–12(–22+) × 1–6(–12+) cm, sometimes pinnately lobed, bases ± cuneate, ultimate margins usually coarsely toothed to subentire, sometimes sinuate, apices acute, faces ± scabrellous to strigillose.

all or mostly opposite (distal sometimes alternate);

blades ovate-deltate to lance-elliptic, 3–8(–11) × 1–4(–6) cm, bases subtruncate to cuneate, margins coarsely toothed to subentire, apices acute to attenuate, faces ± hirsutulous to scabrellous.

± obconic to turbinate, 3–5 mm diam.

± hemispheric, 8–10 mm diam.

(1–)2–3(–7);

laminae 3–4(–7+) mm.

13;

laminae 9–12+ mm.

8–12(–15);

corollas ochroleucous or white.

60–100+;

corollas yellow.

8–12+ in 1–2 series, ± erect, spatulate to oblanceolate, 2.5–5(–7) mm.

12–16 in 2 series, ± erect, linear to lance-ovate or lance-linear, 4–7 mm.

(20–)60–100+ in corymbiform to paniculiform arrays.

borne singly or 2–6 in loose, corymbiform arrays.

dark brown to blackish, oblanceolate, 3.5–5+ mm, faces ± scabrellous;

pappi 1.5–3+ mm.

dark brown, obovate, 4–5 mm, faces glabrous;

pappi 0–0.5 mm.

= 32, 34.