Flora of North America species comparison

puberulent, glabrescent.

glabrous or glabrate.

mostly cauline;

blades ± lanceolate, 9–15(–25+) cm × 15–45(–60+) mm, l/w = (3.3–)4–6+, abaxially scabrellous, tomentose, or pannose, resin-gland-dotted, adaxially scabrellous, often resin-gland-dotted.

mostly cauline;

blades lance-linear to linear, 3–7+ cm × 2–8+ mm, l/w = 7–15+, abaxially scabrellous (hairs appressed, awl-shaped), resin-gland-dotted, adaxially scabrellous, glabrescent, resin-gland-dotted.

2–35 mm.

12–35 mm.

± hemispheric, 6–10 × 7–10 mm.

campanulate to obconic, 6–8 × 6–10 mm.

30–45(–65).

18–25+.

35–60+ in 4–6+ series, sparsely tomentulose, glabrescent, margins ciliolate, the outer lanceolate to subulate, 1–3 mm, inner oblong, 7–9+ mm, tips subulate to filiform.

30–40+ in 4–5 series, puberulent, margins arachno-ciliate, the outer lance-ovate, 2–3 mm, inner lance-oblong to linear-oblong, 6–7 mm, tips acute or rounded-apiculate.

in corymbiform to paniculiform arrays.

in open, corymbiform to paniculiform arrays.

3.5–4+ mm;

pappi fuscous to purplish, outer scales 20, 0.2–0.6+ mm, contrasting with 30–40+, 5–7+ mm inner bristles.

2.5–3+ mm;

pappi stramineous to whitish, outer scales 25–30, 0.5–1.1 mm, contrasting with 30–40+, 5–7+ mm inner bristles.

= 34.

= 34.