Flora of North America species comparison

branched, pubescent, gland-dotted.

branched, pubescent, gland-dotted.

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.

mostly opposite, sometimes alternate or subopposite;

petioles 0–3 mm;

blades 3-nerved from bases, lanceolate to obovate, 20–60 × 12–30 mm, bases ± cuneate, margins crenate to serrate, apices obtuse to acute, abaxial faces tomentose, often densely gland-dotted as well (venation raised, reticulate), adaxial faces pubescent and gland-dotted.

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

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

narrowly cylindric, 10–13 mm.

cylindric to campanulate, 8–13 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

10–21;

corollas greenish, yellow, or yellow-orange, often purple-tinged, 5–7 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).

18–22 in 5–7 series, greenish, often purplish-tinged, 6–8-striate, unequal, margins scarious (apices acute to acuminate);

outer ovate (sparsely villous, gland-dotted, lengths no more than 1/2 inner, margins long-ciliate), inner narrowly lanceolate to linear-oblong (glabrous).

in paniculiform arrays.

in ± dense, racemiform or paniculiform arrays.

2.5–4 mm, densely pubescent;

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

3.5–5 mm, sparsely to densely pubescent;

pappi of 30–35, white to tawny, barbellate bristles.

= 18.