Flora of North America species comparison

glabrous.

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) 1–12 mm.

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

4–5(–6);

corolla tubes glabrous inside.

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

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

3–3.5 mm;

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

globose (fibrous roots often densely covering whole structure).

= 20, 60.