Flora of North America species comparison

branched, pubescent, gland-dotted.

branched from bases, pubescent and 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.

opposite;

petioles 0–1 mm;

blades 3-nerved from bases (pinnately-veined distally), lanceolate to oblong, 40–160 × 10–75 mm, bases rounded to cordate (clasping), margins crenate to serrate, apices acute, faces densely to sparsely pubescent and stipitate-glandular.

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

7–25 mm, densely stipitate-glandular.

narrowly cylindric, 10–13 mm.

cylindric to campanulate, 9–13 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

13–22;

corollas pale yellow or cream, often purple- or red-tinged, 6–8 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).

18–24 in 4–5 series, greenish, often purple-tinged, 3–8-striate, unequal, margins narrowly scarious (apices acute to acuminate);

outer ovate (6–8-striate, sparsely glandular at apices), inner narrowly lanceolate (3–4-striate, glabrous).

in paniculiform arrays.

in paniculiform arrays.

2.5–4 mm, densely pubescent;

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

2.8–4 mm, densely pubescent to hirtellous;

pappi of 35–60 white, barbellulate bristles.