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 ± ovate to elliptic or lanceolate, 3–7+ × 0.8–2.5+ cm, bases ± cuneate, margins toothed, apices obtuse, faces scabrellous.

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

hemispheric or broader, 12–15+ mm diam.

(8–)12–15+;

laminae 8–10(–20+) mm.

(5–)8;

laminae 12–15+ mm.

80–150+;

corollas yellow.

20–60+;

corollas yellow.

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

18–20+ in 2–3 series, ± erect, narrowly oblong to lanceolate, 4–6+ mm.

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

borne singly or 3–9+ 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).

purplish black, narrowly obovate to ± elliptic, 5 mm, faces glabrous;

pappi 0–0.3 mm.

= 34.

= 34.