Flora of North America species comparison

hirtellous.

glabrous.

basal and proximal cauline 1-nerved, spatulate-oblanceolate to narrowly oblanceolate, 40–150(–180) × 4–8(–11) mm, abruptly reduced (linear, 1–2 mm wide), then gradually reduced distally, essentially glabrous or hirtellous (sometimes mostly along abaxial midveins), gland-dotted.

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).

0.

0 or (ascending) mostly 2–12 mm.

cylindric, 8–12 × 3.5–5 mm.

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

3–4;

corolla tubes glabrous inside.

7–10(–12);

corolla tubes pilose inside.

in 3(–4) series, oblong to oblong-lanceolate, unequal, usually glabrous, rarely minutely puberulent, margins with hyaline borders, apices acute to acuminate.

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).

(appressed, overlapping) in dense, spiciform arrays.

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

(3–)4–6 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose to elongate.

mostly globose.

= 20.

= 20.