Flora of North America species comparison

puberulent (at least distally, sometimes glabrous proximally).

piloso-puberulent to hirsute.

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-oblanceolate, 120–300 × 3–8 mm, gradually reduced distally to ± midstem, abruptly reduced to ± uniform bracts distally, essentially glabrous, gland-dotted (margins sometimes sparsely ciliate).

usually (ascending) 10–50 mm.

0 or 1–5(–10) mm.

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

cylindro-campanulate, 8–10 × 4–5 mm.

19–80;

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

6–10;

corolla tubes glabrous 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(–5) series, ovate to oblong-oblanceolate or oblong-lanceolate, strongly unequal, usually essentially glabrous, sometimes sparsely strigose to pilosulous, margins with hyaline borders, ciliolate, apices acute (inner with slightly subterminal, ‘rolled’ apicula), ciliolate.

in racemiform arrays.

in dense, spiciform arrays.

4.5–6(–6.5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

3–3.5 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

subglobose.

elongated into rhizomes, irregularly shaped (sometimes with thickened, fibrous roots).

= 20.