Flora of North America species comparison

glabrous or sparsely to moderately pilose distally or throughout.

glabrous.

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).

basal and proximal cauline 1-nerved, linear, 50–140 × 1–7 mm, gradually or little reduced distally, essentially glabrous or sparsely piloso-hirsutulous, gland-dotted (margins sometimes ciliate).

0 or (ascending) 1–10(–80) mm.

0 or very rarely 1–2 mm.

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

campanulate-cylindric, 7–15 × (4–)5–7 mm.

(6–)7–12(–13, mostly 9–12 in Del.

3–8;

corolla tubes glabrous inside.

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 3–6 series, mostly oblong-obovate, unequal, essentially glabrous, margins without hyaline borders, sometimes ciliate, apices acute, acute-acuminate, obtuse, rounded, or rounded-truncate (often with indurate apicula or mucros, lateral veins usually not evident beyond middle or at least on distal 1/3).

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

in dense to loose, spiciform arrays.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

(5.5–)6–8.5 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose.

globose to depressed-globose or elongate, sometimes becoming simple or branched rhizomes.

N.J.);

corolla tubes pilose inside.

= 20.