Flora of North America species comparison

1–5, sparsely to moderately strigoso-puberulent.

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.

basal (rosettes) usually withering by flowering;

petiole bases or vasculature not persisting on rhizomes;

proximalmost cauline petiolate, sometimes present at flowering;

proximal and distal sometimes 3-nerved.

linear, 1–3 mm, bracteate.

narrowly campanulate, 3–5 mm.

0(–2).

4–8;

corollas 3 mm, lobes 1 mm.

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

1-nerved, usually not striate (3–5-nerved and striate in S. glomerata, S. lancifolia, S. roanensis) sometimes minutely stipitate-glandular, sometimes resinous.

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

in ± paniculiform or thyrsiform arrays (wand-, club-, or secund cone-shaped) or in axillary clusters, sometimes in rounded corymbiform arrays.

2.5–3 mm, moderately short-strigose;

pappi 2 mm.

bristles in 2–3 series (shorter, outer setiform scales rarely present, outer, longer bristles apically attenuate, inner bristles longest, weakly to strongly clavate).

= 18.