Flora of North America species comparison

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

intricately branched, hirtellous, sparsely gland-dotted.

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 1–2 mm;

blades (venation obscure) oblong to spatulate, 3–12 × 1–4 mm, bases acute to acuminate, margins entire, apices acute to obtuse, faces tomentose, gland-dotted.

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

10–30 mm, villous, gland-dotted.

cylindric to campanulate, 8–12 mm.

cylindric, 9–11 mm.

13–25;

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

20–30;

corollas purplish, 6.5–7.5 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).

20–25 in 5–6 series, greenish, often purple-tinged, 4–5-striate, unequal, (sparsely villous, gland-dotted) margins narrowly scarious (apices rounded, mucronate);

outer ovate to lanceolate (ciliate), inner linear-oblong.

in loose, paniculiform arrays.

in paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.