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 usually opposite);

blades lance-elliptic to lanceolate or lance-linear, 10–20 × 2–7 cm, bases ± cuneate, margins coarsely toothed to subentire, apices acute, faces ± hirtellous.

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

± saucerlike, 8–10 mm diam.

(8–)12–15+;

laminae 8–10(–20+) mm.

0.

80–150+;

corollas yellow.

40–60+;

corollas ochroleucous to white.

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

12–15+ in 1–2 series, ± spreading, oblanceolate to linear, 2–5+ mm.

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

8–35+ 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, obovate, 3–4.5+ mm, faces ± strigillose;

pappi 1–2 mm (sometimes shorter scales between awns).

= 34.

= 34.