Flora of North America species comparison

glabrous or densely piloso-puberulent.

glabrous.

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).

basal and proximal cauline 1-nerved, linear to linear-lanceolate, 70–150 × 1–2.5 mm, abruptly or gradually reduced on distal 1/2 of stems, essentially glabrous (margins sometimes sparsely ciliate).

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

0.

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

cylindro-turbinate, 9–12 × 3.5–5 mm.

(4–)5–8;

corolla tubes glabrous inside.

3–4(–5);

corolla tubes glabrate inside.

(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 2–3 series, (often dark purple in anthesis) oblong-lanceolate to lanceolate-triangular, weakly unequal, essentially glabrous, margins without hyaline borders, sometimes sparsely ciliate, apices acute to acute-attenuate (sometimes with narrow tips).

in dense, spiciform arrays.

(closely spaced, stems obscured) in dense, (cylindric) spiciform arrays.

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

4.5–6 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose, sometimes becoming elongate rhizomes.

globose or subglobose.