Flora of North America species comparison

glabrous.

glabrous.

basal and proximal cauline 1-nerved, linear-oblanceolate to narrowly oblanceolate, 80–210 × 2–5(–10) mm, gradually or abruptly reduced distally, essentially glabrous (sparsely piloso-ciliate along proximal margins), gland-dotted.

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).

0 or (ascending) 2(–7) mm.

0 or (ascending) mostly 2–12 mm.

turbinate, 6–8 × 5–7 mm.

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

(7–)8–11(–13);

corolla tubes pilose inside.

7–10(–12);

corolla tubes pilose inside.

in 3–4(–5) series, mostly oblong, unequal, essentially glabrous, margins with hyaline borders (0.2–0.4 mm wide), sometimes sparsely ciliolate, apices rounded.

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 loose, racemiform arrays (internodes 2–14 mm).

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

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

mostly globose.

mostly globose.

= 20.

= 20.