Flora of North America species comparison

glabrous.

glabrous or sparsely pilose.

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.

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).

0 or (ascending) 1–12 mm.

(ascending) 1–7 mm.

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

turbinate-campanulate, 5–7 × 4–5 mm.

4–5(–6);

corolla tubes glabrous inside.

4–6;

corolla tubes glabrous inside.

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

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.

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

in compact, racemiform arrays.

3–3.5 mm;

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

2.5–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose (fibrous roots often densely covering whole structure).

globose.

= 20, 60.