Flora of North America species comparison

1(–5), erect, usually branching only in array, moderately to densely hispido-villous.

1 (at ends of rhizomes), ascending to erect, grayish green, moderately to densely finely strigilloso-puberulent.

basal and proximal cauline tapering to winged petioles, blades oblanceolate to ovate, 35–210 × 15–50 mm, margins serrate or crenate, apices acute, sparsely to moderately soft hispido-villous, more densely so on abaxial nerves;

rosettes on rhizome branches sometimes present at flowering;

mid and distal cauline sessile, blades elliptic, 15–50 × 5–15 mm, distally reduced, margins entire.

basal and proximal often withering by flowering, gradually tapering to winged petioles 1/2 length of leaf, blades 45–100 × 10–35 mm, proximalmost much smaller, margins serrate, faces moderately finely scabroso-strigillose;

mid and distal cauline sessile, blades elliptic to lanceolate or ovate, 10–60 × 4–20 mm, sometimes much reduced distally, firm, thickish, margins serrate to entire, strongly 3-nerved or sometimes brochidodromous, faces moderately finely strigillose.

1.5–2.5 mm, hispido-villous to canescent.

0.5–3 mm, moderately to densely finely hispiduloso-strigillose;

bracteoles 0–3, lanceolate, strigillose, grading into phyllaries.

campanulate, 3–5 mm.

campanulate, 3–6 mm.

7–9 (white);

laminae 3.5–4 × 1–1.5 mm.

6–10;

laminae 1–2 × 0.2–0.6 mm.

9–12;

corollas 3–4 mm, lobes 0.6–1.2 mm.

3–8;

corollas 2.4–3.8 mm, lobes 0.7–1.2 mm.

in 3–4 series, appressed, strongly unequal, oblong, margins white, scarious, apices obtuse to rounded.

in 3–4 series, lanceolate to oblong (to 1.5 mm wide), strongly unequal, margins ciliate, apices acute to obtuse, glabrous.

12–270 (1–15 per branch) in usually wand-shaped paniculiform arrays, of short axillary and terminal racemiform, non-secund clusters, sometimes proximal branches elongated, ascending and bearing short axillary and terminal racemiform clusters.

(5–)50–300, in compact thyrsiform to secund-pyramidal paniculiform arrays, proximal branches ascending, sometimes apically recurved or branches spreading, recurved, secund.

(narrowly obconic) 1.5–2.5 mm, smooth or with 5–8 narrow, darker, sunken striations, glabrous or sparsely strigose;

pappi 2.5–3.5 mm (sometimes strongly clavate).

(cylindro-obconic) 1.5–2 mm, sparsely strigillose;

pappi ca. 2–3 mm.

=18.

= 18, 36, 54.