Flora of North America species comparison

erect, green to reddish or purple mottled, proximally glabrous, distally sparsely tomentulose.

1–5, usually erect, sometimes decumbent (P. bootii), usually simple (leafy), usually glabrous proximally, tomentulose distally.

proximal often withered by flowering; petiolate (petioles 1–10 cm, often with pair of lobes);

blades deltate to ovate or elliptic, 5–20 × 4–10 cm, coriaceous, margins usually deeply, pinnately 3–5-lobed, lobes and sinuses large and ± rounded, sometimes deeply cleft to base or palmately divided, apices acute or obtuse, ultimate margins entire or dentate, faces glabrous or finely tomentose on veins;

cauline sessile or petiolate;

distal reduced in size and lobing, often entire.

basal and cauline; petiolate or sessile;

blades deltate to triangular, or ovate to oblanceolate, or oblong to linear, or spatulate, margins often pinnately or palmately lobed (sometimes deeply cleft and appearing compound), ultimate margins entire or coarsely serrate or dentate (apices acute, obtuse, or rounded);

distal leaves reduced in size and lobing.

not inflated distally, bracteate.

cylindric (often attenuate basally to bracteate peduncles), 12–15 × 4–5 mm.

narrowly cylindric to campanulate (bases often attenuate), 2–14 mm diam.

slightly convex, smooth, glabrous, epaleate.

(8–)10–14(–19);

corollas usually yellow to pale yellow, 9–15 mm.

4–38;

corollas usually creamy white, pink, or lavender, rarely yellow or red (glabrous).

(7–)8–(10), green or often purple, narrowly lanceolate to elliptic, 10–13 mm, sparsely hispid to appressed, coarsely setose, often reduced to single coarse, appressed seta (setae green or tan).

3–15 in 1 series, (yellow green or green to purple or blackish) subulate or linear to lanceolate or elliptic, equal, margins scarious, apices acute, faces glabrous, tomentulose, hispid, or coarsely setose.

of 8–10, green to purple, triangular to subulate bractlets 1–4 mm, often tomentulose to setose.

of 2–12, triangular to linear-lanceolate or subulate, unequal bractlets.

(6–12 in nodding clusters) in broad, paniculiform to corymbiform arrays (often widely branching and subdichotomous, at least some branches elongate).

(usually nodding at flowering) in racemiform, paniculiform, thyrsiform, or corymbiform arrays.

golden brown to light tan, subcylindric, subterete or angled, 5–8 mm, indistinctly 8–10-ribbed;

pappi tan, 7–8 mm.

golden brown to light tan, narrowly subcylindric, or fusiform to oblanceoloid, or oblong to linear, subterete or angled, apices truncate, not beaked, faces finely 5–12-ribbed, usually glabrous;

pappi persistent, of 30–50, dull white to yellow or tan, rarely reddish brown, ± equal, barbellulate bristles in 1 series.

= 8.

= 16.