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, linear to linear-lanceolate, 80–200 × 1–3(–4, –6) mm, gradually reduced or abruptly reduced on distal 1/2 of stems, essentially glabrous.

0.

0 or (ascending) 1–12 mm.

cylindric, 8–12 × 3.5–5 mm.

turbinate-cylindric, 5–7(–9) × 3–4 mm.

3–4;

corolla tubes glabrous inside.

4–5(–6);

corolla tubes glabrous inside.

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

in 3–4 series, oblong to oblong-obovate, strongly unequal, essentially glabrous, margins with hyaline borders, apices rounded.

(appressed, overlapping) in dense, spiciform arrays.

in loose to dense, spiciform arrays (internodes to 8 mm).

(3–)4–6 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3–3.5 mm;

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

globose to elongate.

globose (fibrous roots often densely covering whole structure).

= 20.

= 20, 60.