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 opposite (distal sometimes alternate);

blades ± rhombic to ovate, 5–12+ × 3–6+ cm, bases rounded to cuneate, margins coarsely toothed to subentire, apices ± acute, faces ± scabrellous.

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

± hemispheric, 10–20+ mm diam.

(8–)12–15+;

laminae 8–10(–20+) mm.

10–13;

laminae 12–25+ mm.

80–150+;

corollas yellow.

60–100+;

corollas yellow.

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

24–30+ in 2–3 series, ± erect, spatulate or oblanceolate to lanceolate, 5–12+ mm.

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

borne singly or (2–)5–15+ in loose, corymbiform 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, narrowly lance-elliptic, 8–10 mm, faces glabrous or sparsely hirtellous;

pappi 3–4 mm.

= 34.