Flora of North America species comparison

much branched from bases, pubescent, often gland-dotted.

branched from near bases, glandular-pubescent.

opposite;

petioles 4–12 mm;

blades 3-nerved from bases, broadly ovate to deltate, 10–60 × 10–30 mm, bases truncate, hastate, or subcordate, margins usually toothed (1–3 sets of sharp teeth near bases), rarely subentire, apices attenuate, faces minutely pubescent.

alternate;

petioles 5–60+ mm;

blades 3-nerved from bases, ovate to deltate, 10–100 × 10–90 mm, bases cordate to truncate, margins crenate to serrate, apices acute to rounded, faces puberulent to glabrate, often gland-dotted.

5–40 mm, pubescent and sometimes gland-dotted.

1–5 mm, glandular-pubescent.

cylindric to campanulate, 8–12 mm.

cylindric to obconic, 7–12 mm.

13–25;

corollas pale yellow-green, often purple-tinged, 7–8.2 mm.

8–12;

corollas pale yellow-green, 5.5–8 mm.

17–22 in 4–6 series, greenish, often purple-tinged, 4–5-striate, unequal, margins scarious (apices acute to acuminate or mucronate, minutely pubescent);

outer lance-ovate to narrowly lanceolate (glabrous or sparsely pubescent), inner narrowly lanceolate to linear (glabrous).

21–35 in 5–6 series, greenish, often purple-tinged, 3–4-striate, unequal, margins scarious;

outer ovate to lance-ovate (glabrous or sparsely glandular-pubescent, apices acute to acuminate), inner lanceolate (glabrous, apices obtuse to acuminate).

in loose, paniculiform arrays.

borne in (leafy) paniculiform arrays.

3–5 mm, hispidulous, strigose, or glandular-pubescent;

pappi of 28–40 smooth or barbellulate bristles.

2.5–3.5 mm, puberulent;

pappi of 24–30 white, barbellate bristles.

= 18.