Flora of North America species comparison

glabrous or sparsely pilose.

glabrous.

basal and proximal cauline (arising from separated nodes) 1-nerved, linear to linear-lanceolate, 100–300 × 1–2(–2.5) mm, gradually or abruptly reduced distally, essentially glabrous, gland-dotted (proximal margins sometimes ciliate).

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).

(ascending) 1–7 mm.

0 or (ascending) mostly 2–12 mm.

turbinate-campanulate, 5–7 × 4–5 mm.

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

4–6;

corolla tubes glabrous inside.

7–10(–12);

corolla tubes pilose inside.

in 2–3(–4) series, lanceolate to oblong or elliptic-oblong, unequal, essentially glabrous, margins with (pinkish purple) hyaline borders, apices usually rounded-retuse and minutely involute-cuspidate to apiculate.

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 compact, racemiform arrays.

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

2.5–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose.

mostly globose.

= 20.