Flora of North America species comparison

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

branched, stipitate-glandular.

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 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.

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

3–18 mm, stipitate-glandular.

cylindric to campanulate, 8–12 mm.

cylindric to campanulate, 7.5–8.5 mm.

13–25;

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

15–24;

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

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 loose, paniculiform arrays.

in paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

2–3 mm, strigose;

pappi of 30–35 white, barbellulate bristles.

= 18.