Flora of North America species comparison

glabrous.

glabrous or sparsely to moderately pilose distally or throughout.

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).

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 (spreading-ascending) 2–10(–20) mm.

0 or (ascending) 1–10(–80) mm.

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

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

10–35;

corolla tubes glabrous inside (lobes adaxially hispid).

(6–)7–12(–13, mostly 9–12 in Del.

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 (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.

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

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

5–7 mm;

pappi: lengths ± equaling corollas, bristles plumose.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

usually globose, rarely elongate.

globose.

N.J.);

corolla tubes pilose inside.

= 20.