Flora of North America species comparison

glabrous.

glabrous or puberulent-villous.

basal and proximal cauline 1-nerved, linear to linear-lanceolate, 70–150 × 1–2.5 mm, abruptly or gradually reduced on distal 1/2 of stems, essentially glabrous (margins sometimes sparsely ciliate).

basal and proximal cauline 3–5-nerved, broadly linear to linear-oblanceolate, 70–220 × 2–12 mm (largest usually distal to proximalmost), gradually reduced distally, puberulent-villous or glabrous, weakly gland-dotted.

0.

0 or (spreading to ascending) 1–8(–20+) mm.

cylindro-turbinate, 9–12 × 3.5–5 mm.

cylindro-campanulate, 12–20(–25) × 7–10 mm.

3–4(–5);

corolla tubes glabrate inside.

(10–)23–45(–60);

corolla tubes glabrous inside (lobes adaxially hispid).

in 2–3 series, (often dark purple in anthesis) oblong-lanceolate to lanceolate-triangular, weakly unequal, essentially glabrous, margins without hyaline borders, sometimes sparsely ciliate, apices acute to acute-attenuate (sometimes with narrow tips).

(usually erect, sometimes spreading-reflexing on the distal 1/3) in 5–7 series, narrowly ovate-triangular and foliaceous (outer) to ovate or oblong-triangular, ± equal, glabrous or pubescent, margins without hyaline borders, stiffly to softly ciliate, apices acuminate to acute.

(closely spaced, stems obscured) in dense, (cylindric) spiciform arrays.

borne singly or (3–26) in loose, racemiform to spiciform arrays.

4.5–6 mm;

pappi: lengths ± equaling corollas, bristles plumose.

4–5.5 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose or subglobose.

globose to slightly elongate.