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 3–5-nerved, linear to linear-oblanceolate, 100–400 × 1–3(–5) mm, gradually reduced distally or abruptly on distal 1/2 of stems, essentially glabrous (bases of basal usually fibrous-persistent).

0 or (ascending) 2(–7) mm.

0.

turbinate, 6–8 × 5–7 mm.

cylindro-turbinate, 6–7(–10) × ca. 3 mm.

(7–)8–11(–13);

corolla tubes pilose inside.

(2–)3–4(–5);

corolla tubes glabrous 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.

in 3–4 series, (often purple) oblong-oblanceolate to oblong-lanceolate, unequal, essentially glabrous, margins with hyaline borders, ciliolate, apices (erect or ± appressed) acuminate to acute.

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

in dense, spiciform arrays.

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

4–4.5 mm;

pappi: lengths ± equaling corollas, bristles barbellate to subplumose.

mostly globose.

usually globose to subglobose, sometimes ovoid to elongate.

= 20.

= 20.