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 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.

± saucerlike, 8–10 mm diam.

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

0.

12–16+;

laminae 10–12+ mm.

40–60+;

corollas ochroleucous to white.

80–150+;

corollas yellow to orange.

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

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

8–35+ in corymbiform to paniculiform arrays.

borne singly or 2–3 together.

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

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

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

pappi 0.5–1+ mm.

= 34.

= 68.