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, narrowly oblanceolate, (50–)90–150 × (2–)4–9(–12) mm wide, usually abruptly, sometimes gradually, reduced distally, glabrous or sparsely pilose (abaxially), gland-dotted (proximal margins sparsely pilose-ciliate).

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

0 or (ascending) mostly 2–12 mm.

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

campanulate-cylindric, (6–)7–9 × 3.5–4.5(–5) mm.

(4–)5–8;

corolla tubes glabrous inside.

7–10(–12);

corolla tubes pilose 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).

usually in 3–5(–6) series, in 5–6(–7) series in largest heads, ovate-triangular to oblong, unequal, glabrous, margins with narrow, hyaline borders (lacking at apices), sometimes sparsely ciliolate, apices acute to obtuse-angled (with thickened, not markedly involute, apicula).

in dense, spiciform arrays.

in loose, racemiform to spiciform arrays (not secund, internodes 6–20 mm).

3.8–4.5(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose, sometimes becoming elongate rhizomes.

mostly globose.

= 20.