Flora of North America species comparison

glabrous or sparsely to moderately pilose distally or throughout.

stipitate-glandular.

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 to linear-lanceolate, 60–110 × 1.5–4(–4.5) mm, gradually or abruptly reduced on distal 1/2 of stems, stipitate-glandular.

0 or (ascending) 1–10(–80) mm.

0.

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

cylindro-turbinate, 8–12 × 3–5 mm.

(6–)7–12(–13, mostly 9–12 in Del.

3–4(–5);

corolla tubes glabrous or glabrate 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 3–4 series, (green, rarely purplish) oblong-lanceolate to lanceolate-triangular, unequal, densely glandular (mixture of sessile-sunken and slightly elevated glands), margins without hyaline borders, apices broadly to narrowly acute or acuminate (sometimes with indurate mucros).

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

in dense, (cylindric) spiciform arrays.

(2.5–)3–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

5–6 mm;

pappi: lengths ± equaling corollas, bristles plumose.

globose.

subglobose to depressed-globose.

N.J.);

corolla tubes pilose inside.

= 20.

= 20.