Flora of North America species comparison

erect to ascending (usually abruptly dilated proximal to heads), villous (more densely so on proximal 1/2), eglandular.

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

basal (persistent) and cauline;

basal blades oblanceolate to obovate or suborbiculate, subspatulate, 20–130(–180) × 6–30(–50) mm;

cauline gradually reduced distally (bases clasping and slightly auriculate), margins usually dentate to denticulate, rarely entire, faces sparsely to moderately hirsute to hirsuto-villous, sometimes glabrate or glabrous (especially adaxially), 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.

5–7 × 6–20 mm.

(2–)3–4 × 5–12 mm.

50–80(–100);

corollas light blue to purplish, pink, or white, 6–10 mm, laminae coiling tardily at tips.

50–100;

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

4.5–6 mm.

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

in 2–3(–4) series, sparsely to moderately hirsute to hirsuto-villous (cross walls not distinctly colored), minutely glandular to stipitate-glandular.

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

1–4(–9).

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

1.3–1.8 mm, 2(–4)-nerved, faces sparsely strigose to glabrate or glabrous;

pappi: outer 0 or of setae, inner of (22–)28–36 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).