Flora of North America species comparison

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

1, ascending-erect, softly short villous.

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 and proximal cauline winged-petiolate petioles (petioles 1/2+ leaf length), blades broadly ovate (or subcordate) to elliptic, 50–100(–160) × 30–40 mm, margins shallowly serrate-crenate, apices acute to obtuse, soft short-villous;

mid and distal cauline subpetiolate or sessile, blades ovate to elliptic, 20–40 × 5–15 mm, greatly reduced, becoming narrowly elliptic.

3.1–10.3 mm, glabrate to sparsely strigillose;

bracteoles few, linear.

slender.

campanulate, 3–7 mm.

campanulate, 4–5 mm.

7–16;

laminae 2–5 × 0.7–0.9 mm.

usually 7–12;

laminae 3–6 × 1.5–2 mm.

6–31;

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

usually 14–27;

corolla tubes 4 mm, lobes 0.8–1 mm.

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

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

in 3–4 series, broadly lanceolate, unequal, glabrate or sparsely short-strigose.

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.

50–100, in paniculiform arrays, proximal branches obscurely to evidently recurved-secund.

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

pappi 1.9–5.2 mm (bristles sometimes clavate).

1.5–2.5, sparsely strigose;

pappi ± 3 mm (shorter than corollas).

= 18.