Flora of North America species comparison

glabrous.

piloso-puberulent to hirsute.

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-oblanceolate, 120–300 × 3–8 mm, gradually reduced distally to ± midstem, abruptly reduced to ± uniform bracts distally, essentially glabrous, gland-dotted (margins sometimes sparsely ciliate).

0 or (ascending) 2(–7) mm.

0 or 1–5(–10) mm.

turbinate, 6–8 × 5–7 mm.

cylindro-campanulate, 8–10 × 4–5 mm.

(7–)8–11(–13);

corolla tubes pilose inside.

6–10;

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(–5) series, ovate to oblong-oblanceolate or oblong-lanceolate, strongly unequal, usually essentially glabrous, sometimes sparsely strigose to pilosulous, margins with hyaline borders, ciliolate, apices acute (inner with slightly subterminal, ‘rolled’ apicula), ciliolate.

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.

3–3.5 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

mostly globose.

elongated into rhizomes, irregularly shaped (sometimes with thickened, fibrous roots).

= 20.

= 20.