Flora of North America species comparison

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

decumbent to erect, mottled purple, simple, glabrous 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.

proximal present at flowering; petiolate (petioles 2–8 cm, not winged);

blades ovate to deltate, 2–8 × 0.5–3 cm, bases hastate or sagittate, margins entire or weakly dentate, faces glabrous;

distal reduced, elliptic to lanceolate.

narrowly campanulate, 10–13 × 5–6 mm.

cylindro-campanulate, 10–11 × 5–6 mm.

7–16;

corollas white to purplish, 9–16 mm.

9–20;

corollas white, 7–13 mm.

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

8–11, dark green to almost black, lanceolate to subulate, 8–12 mm, faces glabrous.

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

of 4–5, dark green to blackish, subulate bractlets 2–5 mm, glabrous.

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

(10–20) in narrow, racemiform to thyrsiform arrays (nodding).

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

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

light tan to yellow, subcylindric, subterete to angled, 5–6 mm, indistinctly 7–10-ribbed;

pappi pale yellow, 6–8 mm.

= 16.

= 32.