Flora of North America species comparison

glabrous.

glabrous or densely piloso-puberulent.

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, linear to narrowly oblanceolate or oblanceolate, 110–220 × 4–10(–12) mm, gradually then abruptly reduced distally (bractlike proximal to heads), essentially glabrous or sparsely pilose to densely piloso-puberulent, weakly gland-dotted (bases of basal usually fibrous-persistent).

0 or (ascending) 2(–7) mm.

usually 0, rarely (spreading to ascending) 1–2 mm.

turbinate, 6–8 × 5–7 mm.

campanulate-cylindric, 7–9(–10) × 3.5–5 mm.

(7–)8–11(–13);

corolla tubes pilose inside.

(4–)5–8;

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.

(reflexed or curving-spreading) in 4–5 series, oblong-lanceolate, unequal, essentially glabrous or ± pilose, margins with hyaline borders, sometimes ciliate, apices usually acute to acute-acuminate (sometimes distally dilated, nearly petaloid).

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

in dense, spiciform arrays.

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

mostly globose.

globose, sometimes becoming elongate rhizomes.

= 20.