Flora of North America species comparison

branched, pubescent, gland-dotted.

branched, villous, stipitate-glandular.

mostly alternate, sometimes opposite;

petioles 0–5 mm;

blades 3-nerved from bases (venation raised, reticulate), elliptic to lanceolate or ovate to subdeltate, 20–70 × 7–20 mm, bases ± cuneate, margins crenate to serrate, apices acute, faces glandular-pubescent.

alternate;

petioles 0–2 mm;

blades 3-nerved from bases, ovate, 15–30 × 5–25 mm, bases rounded to truncate, margins evenly to irregularly serrate, apices acute, faces viscid-glandular.

2–15 mm, tomentose, often gland-dotted.

0–2 mm.

narrowly cylindric, 10–13 mm.

broadly cylindric to campanulate, 14–18 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

44–60;

corollas yellow-green, often purple-tinged, 8–10 mm.

18–20 in 3–4(–5) series, green or purplish, 5–9-striate, unequal, margins scarious (apices acute, attenuate, obtuse, or nearly rounded);

outer ovate (lengths evenly grading to inner, margins ciliate, faces pubescent, often gland-dotted), inner narrowly lanceolate to linear-oblong (faces glabrous).

(24–)36–42 in (3–)5–7 series, greenish or stramineous, often purple-tinged, 3–5-striate, unequal, margins narrowly scarious (apices acute to long-acuminate);

outer lance-ovate to lanceolate (sparsely gland-dotted), inner narrowly lanceolate (glabrous).

in paniculiform arrays.

borne singly or in open, cymiform arrays (each head subtended by leaflike bracts).

2.5–4 mm, densely pubescent;

pappi of 32–43 white, mostly barbellate, sometimes subplumose, bristles.

5.5–7 mm, glabrate to hispidulous;

pappi of 20–30 white, barbellate bristles.

= 18.