Flora of North America species comparison

glabrous.

glabrous.

basal and proximal cauline 1-nerved, lance-linear to linear, 50–150 × 2–5 mm, gradually or abruptly reduced distally, essentially glabrous (proximal margins sparsely ciliate).

basal scalelike (usually withering before flowering), cauline 1-nerved, mostly linear, 12–20(–230) × 1.2–3(–4.5) mm, gradually reduced beyond midstem, essentially glabrous (margins ciliate).

0 or (ascending) 1–6(–10) mm.

(5–)12–40 mm.

cylindro-turbinate, (7–)8–9 × 3.5–4 mm.

campanulate-turbinate, 10–19(–23) × (8–)10–17(–21) mm.

4–7(–9);

corolla tubes pilose inside.

(11–)14–21(–25);

corolla tubes glabrous inside.

in 3–4 series, ovate-oblong, oblong, or oblong-lanceolate (inner 7.5–10 × 1–1.8 mm), strongly unequal, essentially glabrous, margins with hyaline borders (lacking at apices), ciliolate, apices (inner and middle, sometimes outer) rounded to blunt, involute-cuspidate to short-acuminate.

in ± 3–4 series, (green or purple) lanceolate to linear-oblong, unequal, essentially glabrous or sparsely pilose, margins with or without hyaline borders, ciliate, apices long- to short-acuminate.

in dense, racemiform to spiciform arrays (sometimes strongly to weakly secund, especially if branches reclining, internodes 1–5 mm).

borne singly or (2–10) in subcorymbiform arrays.

3–4(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(3.5–)5–7 mm (glabrous);

pappi: lengths ± 1/2–2/3 corollas, bristles barbellate.

globose.

subglobose to depressed hemispheric.