Flora of North America species comparison

1(–10), erect or ascending, green to purple, usually simple, glabrous or glabrate proximally, tomentulose distally.

proximal present at flowering;

petioles winged (2–6 cm);

blades triangular to irregularly elliptic, 3–25 × 1–7 cm, thin or slightly coriaceous, bases abruptly constricted, truncate to slightly hastate, margins irregularly dentate or coarsely serrate, apices acute to acuminate, faces glabrate;

distal sessile, ovate to lanceolate, reduced.

narrowly campanulate, 10–13 × 5–6 mm.

7–16;

corollas white to purplish, 9–16 mm.

8, green to dark green, lanceolate, 8–11 mm, margins scarious, apices acute, finely tomentulose.

of 2–3, dark green, lanceolate or subulate bractlets 1–3 mm, glabrous or finely tomentulose.

(10–17) in broad, corymbiform arrays, lateral branches often elongate and overtopping main stems.

brown to light tan, subcylindric, 4–7 mm, weakly 7–10-ribbed;

pappi pale yellow to dull white, 8–10 mm.

= 16.