Flora of North America species comparison

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

1–5, sparsely to moderately strigoso-puberulent.

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 petioles 3–5 cm, blades oblanceolate or spatulate to ovate or rotund, 2–4 cm (excluding petioles);

cauline (numerous) subsessile or sessile, blades elliptic or lance-elliptic to ovate, mid mostly 25–50(–65) × 10–25 mm, distal much reduced;

branch leaf petioles 1 mm, blades ovate, 5–15 (excluding petioles) × 2–10 mm.

3.1–10.3 mm, glabrate to sparsely strigillose;

bracteoles few, linear.

linear, 1–3 mm, bracteate.

campanulate, 3–7 mm.

narrowly campanulate, 3–5 mm.

7–16;

laminae 2–5 × 0.7–0.9 mm.

0(–2).

6–31;

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

4–8;

corollas 3 mm, lobes 1 mm.

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

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

in 3–4 series, lanceolate, strongly unequal, margins ciliate, apices acute, glabrous.

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.

75–200 in open paniculiform arrays, branches divaricate, ascending to recurved, weakly to strongly secund, to 50 cm, secondary branches less than 3 cm.

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

pappi 1.9–5.2 mm (bristles sometimes clavate).

2.5–3 mm, moderately short-strigose;

pappi 2 mm.

= 18.