Flora of North America species comparison

glabrous.

glabrous or puberulent-villous.

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.

basal and proximal cauline 3–5-nerved, broadly linear to linear-oblanceolate, 70–220 × 2–12 mm (largest usually distal to proximalmost), gradually reduced distally, puberulent-villous or glabrous, weakly gland-dotted.

0 or (ascending) 1–12 mm.

0 or (spreading to ascending) 1–8(–20+) mm.

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

cylindro-campanulate, 12–20(–25) × 7–10 mm.

4–5(–6);

corolla tubes glabrous inside.

(10–)23–45(–60);

corolla tubes glabrous inside (lobes adaxially hispid).

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

(usually erect, sometimes spreading-reflexing on the distal 1/3) in 5–7 series, narrowly ovate-triangular and foliaceous (outer) to ovate or oblong-triangular, ± equal, glabrous or pubescent, margins without hyaline borders, stiffly to softly ciliate, apices acuminate to acute.

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

borne singly or (3–26) in loose, racemiform to spiciform arrays.

3–3.5 mm;

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

4–5.5 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose (fibrous roots often densely covering whole structure).

globose to slightly elongate.

= 20, 60.