Flora of North America species comparison

puberulent (at least distally, sometimes glabrous proximally).

stipitate-glandular.

basal and proximal cauline 1-nerved, elliptic- to oblanceolate-spatulate, 120–300 × 25–50(–55) mm, abruptly, gradually, or little reduced distally, essentially glabrous, weakly, if at all, gland-dotted.

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.

usually (ascending) 10–50 mm.

0.

campanulate to turbinate-campanulate, 11–15 × (12–)15–22(–25) mm.

cylindro-turbinate, 8–12 × 3–5 mm.

19–80;

corolla tubes usually pilose inside, sometimes glabrous (Arkansas, Illinois, Missouri).

3–4(–5);

corolla tubes glabrous or glabrate inside.

in (3–)4–5 series, (erect or outer sometimes spreading-reflexing) oblong-obovate to broadly obovate (not bullate), unequal, glabrous or minutely puberulent, margins usually with relatively narrow, hyaline borders, apices broadly rounded.

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 racemiform arrays.

in dense, (cylindric) spiciform arrays.

4.5–6(–6.5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

5–6 mm;

pappi: lengths ± equaling corollas, bristles plumose.

subglobose.

subglobose to depressed-globose.

= 20.