Flora of North America species comparison

glabrous.

glabrous or sparsely to moderately pilose distally or throughout.

basal and proximal cauline 1-nerved, linear-oblanceolate to narrowly oblanceolate, 80–210 × 2–5(–10) mm, gradually or abruptly reduced distally, essentially glabrous (sparsely piloso-ciliate along proximal margins), gland-dotted.

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).

0 or (ascending) 2(–7) mm.

0 or (ascending) 1–10(–80) mm.

turbinate, 6–8 × 5–7 mm.

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

(7–)8–11(–13);

corolla tubes pilose inside.

(6–)7–12(–13, mostly 9–12 in Del.

in 3–4(–5) series, mostly oblong, unequal, essentially glabrous, margins with hyaline borders (0.2–0.4 mm wide), sometimes sparsely ciliolate, apices rounded.

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 loose, racemiform arrays (internodes 2–14 mm).

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

2.8–3.5(–3.8) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

mostly globose.

globose.

N.J.);

corolla tubes pilose inside.

= 20.

= 20.