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, 80–200 × 1–3(–4, –6) mm, gradually reduced or abruptly reduced on distal 1/2 of stems, essentially glabrous.

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

0 or (ascending) 1–12 mm.

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

turbinate-cylindric, 5–7(–9) × 3–4 mm.

(4–)5–8;

corolla tubes glabrous inside.

4–5(–6);

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, oblong to oblong-obovate, strongly unequal, essentially glabrous, margins with hyaline borders, apices rounded.

in dense, spiciform arrays.

in loose to dense, spiciform arrays (internodes to 8 mm).

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3–3.5 mm;

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

globose, sometimes becoming elongate rhizomes.

globose (fibrous roots often densely covering whole structure).

= 20, 60.