Flora of North America species comparison

basally decumbent, abruptly erect, usually glabrous or glabrate, rarely sparsely strigose on proximal 1/2, or hirsutulous proximally and strigose distally, or distally densely hirsutulous (hairs usually ± deflexed, sometimes loosely antrorsely ascending; var. keilii), eglandular.

erect or ascending, sparsely to moderately strigose to strigillose or hirsuto-strigillose (hairs usually ascending, rarely spreading, 0.1–1.2 mm), eglandular.

cauline;

blades narrowly oblong-oblanceolate to linear, 20–60 × 2–7 mm, seldom reduced distally, margins entire, faces glabrous, sparsely strigose, or hispid, eglandular.

basal (usually persistent through flowering) and cauline;

basal blades spatulate to broadly or narrowly oblanceolate to linear, (10–)30–150(–170) × 5–15(–21) mm;

cauline usually gradually reduced distally, continuing to near heads, margins entire or shallowly to deeply serrate or crenate, faces glabrous or glabrate to sparsely strigose or strigoso-hirsute, eglandular.

4.5–6.5 × 7–12 mm.

(2–)3–4 × 5–12 mm.

50–100;

corollas white, less commonly pinkish or bluish, 4–6 mm, laminae coiling.

0.

3.8–4.5 mm (throats slightly indurate, not inflated).

1.5–2.5 mm (throats sometimes slightly indurate and inflated).

in 3–5 series (margins broad, stramineous, midveins orange, thin), glabrous, usually eglandular, rarely minutely glandular.

in 2–4 series, glabrous, strigose, or sparsely hirsute, sometimes minutely glandular.

(discoid) (1–)2–15 in corymbiform arrays.

10–200+ in loosely corymbiform to paniculiform-corymbiform arrays (on distal branches).

2–3 mm, 2-nerved, faces glabrous;

pappi: outer of setae, inner of 28–45 bristles.

(0.5–)0.9–1.2 mm, 2-nerved, faces sparsely strigose;

pappi: outer crowns of setae or scales, inner 0 (rays) or of 8–15 bristles (disc).