Flora of North America species comparison

strigoso-puberulent.

glabrous.

basal and proximal cauline 1(–3)-nerved, linear-lanceolate to linear-oblanceolate, 120–250 × 2–3(–5) mm, abruptly reduced on distal 1/2–2/3 of stems, sparsely pilose (abaxial faces), gland-dotted.

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).

0 or 1–5 mm.

0 or (ascending) 1–6(–10) mm.

cylindro-campanulate, 10–13 × 5–6(–7) mm.

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

10–12;

corolla tubes glabrous inside.

4–7(–9);

corolla tubes pilose inside.

in 3–4(–5) series, outermost narrowly triangular, unequal, sparsely fine-pilose to glabrate, margins without hyaline borders, ciliate, apices (loosely divergent) acute to acuminate (innermost sometimes obtuse and short-acuminate).

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 loose, spiciform arrays (internodes 1–15 mm).

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

4.2–4.5 mm;

pappi: lengths equaling corollas, bristles barbellate or proximally plumose.

3–4(–5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose to subglobose.

globose.