Flora of North America species comparison

glabrous.

glabrous.

basal and proximal cauline 1-nerved, linear-oblanceolate to narrowly oblanceolate, 80–210 × 2–5(–10) mm, gradually or abruptly reduced distally, essentially glabrous (sparsely piloso-ciliate along proximal margins), gland-dotted.

basal and proximal cauline 1-nerved, linear to linear-lanceolate, 80–200 × 1–3(–4, –6) mm, gradually reduced or abruptly reduced on distal 1/2 of stems, essentially glabrous.

0 or (ascending) 2(–7) mm.

0 or (ascending) 1–12 mm.

turbinate, 6–8 × 5–7 mm.

turbinate-cylindric, 5–7(–9) × 3–4 mm.

(7–)8–11(–13);

corolla tubes pilose inside.

4–5(–6);

corolla tubes glabrous inside.

in 3–4(–5) series, mostly oblong, unequal, essentially glabrous, margins with hyaline borders (0.2–0.4 mm wide), sometimes sparsely ciliolate, apices rounded.

in 3–4 series, oblong to oblong-obovate, strongly unequal, essentially glabrous, margins with hyaline borders, apices rounded.

in loose, racemiform arrays (internodes 2–14 mm).

in loose to dense, spiciform arrays (internodes to 8 mm).

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3–3.5 mm;

pappi: lengths ± 1/2 corollas, bristles barbellate.

mostly globose.

globose (fibrous roots often densely covering whole structure).

= 20.

= 20, 60.