Flora of North America species comparison

glabrous or sparsely pilose.

glabrous or densely piloso-puberulent.

basal and proximal cauline (arising from separated nodes) 1-nerved, linear to linear-lanceolate, 100–300 × 1–2(–2.5) mm, gradually or abruptly reduced distally, essentially glabrous, gland-dotted (proximal margins sometimes ciliate).

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).

(ascending) 1–7 mm.

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

turbinate-campanulate, 5–7 × 4–5 mm.

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

4–6;

corolla tubes glabrous inside.

(4–)5–8;

corolla tubes glabrous inside.

in 2–3(–4) series, lanceolate to oblong or elliptic-oblong, unequal, essentially glabrous, margins with (pinkish purple) hyaline borders, apices usually rounded-retuse and minutely involute-cuspidate to apiculate.

(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 compact, racemiform arrays.

in dense, spiciform arrays.

2.5–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose.

globose, sometimes becoming elongate rhizomes.