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 ± deltate to rhombic, 3–8+ × 2–5+ cm, bases ± cuneate, margins raggedly toothed, apices obtuse to acute, faces strigoso-sericeous.

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

shallowly bowl-shaped, 15–25+ mm diam.

(8–)12–15+;

laminae 8–10(–20+) mm.

12–16+;

laminae 10–12+ mm.

80–150+;

corollas yellow.

80–150+;

corollas yellow to orange.

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

28–35+ in 2–3 series, ± erect, linear to lanceolate, 8–12+ mm.

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

borne singly or 2–3 together.

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

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

blackish, ± elliptic, 6.5–8 mm, faces ± strigillose;

pappi 0.5–1+ mm.

= 34.

= 68.