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 3(–5)-nerved, linear-oblanceolate to linear-lanceolate, 80–250 × 2–6 mm (largest usually distal to proximalmost), gradually reduced distally, essentially glabrous (proximal margins pilose-ciliate).

0 or (ascending) 1–10(–80) mm.

0 or (spreading-ascending) 2–10(–20) mm.

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

cylindro-campanulate, (11–)13–18 × 6–8 mm.

(6–)7–12(–13, mostly 9–12 in Del.

10–35;

corolla tubes glabrous inside (lobes adaxially hispid).

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 5–7 series, ovate-triangular (outer) to broadly oblong or spatulate-oblong, strongly unequal, essentially glabrous, margins usually with narrow hyaline borders, ciliolate, apices broadly rounded, rounded-acuminate, or truncate (inner stiffly mucronate).

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

borne singly or (2–28) in loose to dense, racemiform to spiciform arrays.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

5–7 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose.

usually globose, rarely elongate.

N.J.);

corolla tubes pilose inside.

= 20.