Flora of North America species comparison

puberulent (at least distally, sometimes glabrous proximally).

glabrous or sparsely pilose.

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 (arising from separated nodes) 1-nerved, linear to linear-lanceolate, 100–300 × 1–2(–2.5) mm, gradually or abruptly reduced distally, essentially glabrous, gland-dotted (proximal margins sometimes ciliate).

usually (ascending) 10–50 mm.

(ascending) 1–7 mm.

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

turbinate-campanulate, 5–7 × 4–5 mm.

19–80;

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

4–6;

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 2–3(–4) series, lanceolate to oblong or elliptic-oblong, unequal, essentially glabrous, margins with (pinkish purple) hyaline borders, apices usually rounded-retuse and minutely involute-cuspidate to apiculate.

in racemiform arrays.

in compact, racemiform arrays.

4.5–6(–6.5) mm;

pappi: lengths ± equaling corollas, bristles barbellate.

2.5–4 mm;

pappi: lengths ± equaling corollas, bristles barbellate.

subglobose.

globose.