Flora of North America species comparison

branched, pubescent, gland-dotted.

branched, 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 20–35 mm;

blades 3-nerved from bases, deltate-ovate or rhombic-ovate, 20–140 × 10–100 mm, bases truncate to cordate, margins irregularly dentate, apices acute, faces gland-dotted or glandular-pubescent.

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

3–18 mm, stipitate-glandular.

narrowly cylindric, 10–13 mm.

cylindric to campanulate, 7.5–8.5 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

15–24;

corollas pale yellow-green or greenish white, 5–6.5 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).

22–26 in 5–6 series, greenish, often purple-tinged, 3–4-striate, unequal, margins narrowly scarious (apices obtuse to acute);

outer ovate to lanceolate (glandular-hirtellous, shorter than inner), inner linear-lanceolate (glabrous).

in paniculiform arrays.

in paniculiform arrays.

2.5–4 mm, densely pubescent;

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

2–3 mm, strigose;

pappi of 30–35 white, barbellulate bristles.

= 18.