Flora of North America species comparison

erect, moderately to densely hirsute (hairs 0.5–0.8 mm), 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 (usually withering by flowering) and cauline;

basal blades oblanceolate-spatulate, 30–80 × 6–20(–27) mm, margins entire, faces evenly hirsute to strigoso-hirsute, usually eglandular;

cauline blades lanceolate to oblong, oblong-ovate, or broadly ovate, nearly even-sized distally or sometimes mid largest (continuing to immediately proximal to heads, bases clasping to subclasping).

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.

6–9 × 13–20 mm.

(2–)3–4 × 5–12 mm.

100–150;

corollas blue to lavender, 7–18 mm (ca. 1 mm wide), laminae coiling at tips.

50–100;

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

4–5 mm.

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

in 2–3(–4) series, moderately to densely hirsute, minutely glandular.

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

1–6(–21) in corymbiform arrays.

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

1.6–2 mm, 2(–4)-nerved, faces sparsely strigose;

pappi: outer of setae, inner of 20–30 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).