Flora of North America species comparison

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.

all or mostly alternate (proximal usually opposite);

blades deltate-ovate or deltate to lanceolate, 4–10(–25+) × 2–6(–15) cm, bases broadly cuneate to ± truncate, margins coarsely toothed to subentire, apices obtuse to acute, faces ± hirtellous.

± saucerlike, 8–10 mm diam.

± hemispheric, 5–7 mm diam.

0.

(9–)10–12+;

laminae 4–6 mm.

40–60+;

corollas ochroleucous to white.

20–25+;

corollas ochroleucous or white.

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

12–15+ in 2 series, ± erect, spatulate to linear, 2.5–4 mm.

8–35+ in corymbiform to paniculiform arrays.

30–80+ in ± paniculiform arrays.

dark brown to blackish, obovate, 3–4.5+ mm, faces ± strigillose;

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

dark brown to blackish, oblanceolate, 4–5 mm, faces ± hirtellous or glabrous;

pappi 1.5–2+ mm.

= 34.

= 34.