Flora of North America species comparison

all or mostly alternate (proximal usually opposite);

blades deltate-ovate or rhombic to lanceolate, 3–8(–12+) × 2–4(–6+) cm, bases broadly cuneate to ± truncate, margins coarsely toothed to subentire, apices acute to attenuate, faces strigoso-scabrellous to sericeous.

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.

± hemispheric to saucerlike, 10–20+ mm diam.

± obconic to turbinate, 3–5 mm diam.

(8–)12–15+;

laminae 8–10(–20+) mm.

(1–)2–3(–7);

laminae 3–4(–7+) mm.

80–150+;

corollas yellow.

8–12(–15);

corollas ochroleucous or white.

12–18+ in 1–2 series, ± erect to spreading, lance-ovate or lance-linear to linear, 6–8+ mm.

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

usually borne singly, sometimes 2–3+ in loose, cymiform or corymbiform arrays.

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

dark brown to blackish, narrowly obovate, 3.5–5+ mm, faces ± strigillose;

pappi 0.5–1(–2) mm (0 on ray cypselae).

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

pappi 1.5–3+ mm.

= 34.

= 32, 34.