Flora of North America species comparison

glabrous or sparsely pilose.

glabrous or sparsely to moderately pilose distally or throughout.

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, 60–170(–200) × 2–7(–11) mm, abruptly to gradually reduced distally (becoming linear, spreading-ascending), essentially glabrous or sparsely pilose (abaxially), gland-dotted (proximal margins piloso-ciliate).

(ascending) 1–7 mm.

0 or (ascending) 1–10(–80) mm.

turbinate-campanulate, 5–7 × 4–5 mm.

turbinate to campanulate-cylindric, (7–)8–10 × 5–6 mm.

4–6;

corolla tubes glabrous inside.

(6–)7–12(–13, mostly 9–12 in Del.

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 (3–)4–5(–6) series, oblong, unequal, essentially glabrous, margins with hyaline borders (0.2–0.4 mm wide), erose to lacerate, ciliolate, apices usually rounded, rarely acute.

in compact, racemiform arrays.

in loose to dense, racemiform to spiciform arrays (internodes 1–7 mm).

2.5–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

globose.

globose.

N.J.);

corolla tubes pilose inside.

= 20.