Flora of North America species comparison

1–10+, ascending to erect, proximally glabrous, strigose in arrays.

1–20(–50+), stout, finely puberulent or scabrous-puberulent at least distally.

basal and proximal cauline petiolate, blades narrowly oblanceolate, (20–)50–100(–160) × (2–)5–16(–56) mm, margins serrate to crenate, apices acute to obtuse, glabrous;

mid and distal sessile, similar, blades lanceolate to linear, 12–45 × 2–19 mm, reduced distally, margins entire to sparsely serrate, sometimes resinous.

basal absent at flowering;

cauline sessile to short-petiolate;

blades usually lanceolate-elliptic or ovate, sometimes linear-lanceolate, 30–150 × 5–30 mm, thick and firm, margins entire or few toothed, somewhat to much reduced distally, abaxial faces sometimes resinous and shiny, glabrous or strigillose (hairs mostly 0.1–1.4 mm), adaxial glabrous or scabrous.

3.1–10.3 mm, glabrate to sparsely strigillose;

bracteoles few, linear.

mostly 2–15 mm, bracteolate, sparsely to densely short hispid-strigose.

campanulate, 3–7 mm.

campanulate, 4.5–7.5 mm.

7–16;

laminae 2–5 × 0.7–0.9 mm.

(5–)7–9;

laminae 3–7 × 1–2 mm.

6–31;

corollas 4–4.9 mm, lobes 0.6–1.3(–2) mm.

(8–)10–16;

corollas 4–5 mm, lobes ca. 1–2 mm.

(in 3–4 series) strongly unequal, often resinous;

outer ovate, acute, inner linear-oblong, obtuse.

in 3–4 series, unequal, linear-lanceolate, acute to attenuate, ± squarrose-tipped, glabrous or moderately strigose, sparsely to moderately stipitate-glandular, sometimes viscid.

3–150, not secund, in narrowly elongate, paniculiform arrays, broadly so in robust plants (12.5–19 × 2.5–3 cm wide), consisting of short axillary and terminal racemiform clusters, proximal branches elongate in larger plants, branches glabrate to strigillose.

10–190+ in paniculiform (rarely racemiform) arrays, usually elongate, usually leafy-bracteate, bracts similar to distal leaves but reduced;

branches stiffly ascending, not secund, sometimes elongate.

narrowly obconic, 1.9–3.2 mm, sometimes with dark ridges, strigillose;

pappi 1.9–5.2 mm (bristles sometimes clavate).

3–4 mm, glabrous or glabrate;

pappi ca. 4 mm.

= 18, 36, 54.