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 scalelike (usually withering before flowering), cauline 1-nerved, mostly linear, 12–20(–230) × 1.2–3(–4.5) mm, gradually reduced beyond midstem, essentially glabrous (margins ciliate).

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

(5–)12–40 mm.

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

campanulate-turbinate, 10–19(–23) × (8–)10–17(–21) mm.

(4–)5–8;

corolla tubes glabrous inside.

(11–)14–21(–25);

corolla tubes glabrous 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 ± 3–4 series, (green or purple) lanceolate to linear-oblong, unequal, essentially glabrous or sparsely pilose, margins with or without hyaline borders, ciliate, apices long- to short-acuminate.

in dense, spiciform arrays.

borne singly or (2–10) in subcorymbiform arrays.

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(3.5–)5–7 mm (glabrous);

pappi: lengths ± 1/2–2/3 corollas, bristles barbellate.

globose, sometimes becoming elongate rhizomes.

subglobose to depressed hemispheric.