Flora of North America species comparison

glabrous.

glabrous or puberulent-villous.

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 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) 2(–7) mm.

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

turbinate, 6–8 × 5–7 mm.

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

(7–)8–11(–13);

corolla tubes pilose inside.

(10–)23–45(–60);

corolla tubes glabrous inside (lobes adaxially hispid).

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.

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

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

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

4–5.5 mm;

pappi: lengths ± equaling corollas, bristles plumose.

mostly globose.

globose to slightly elongate.

= 20.