Flora of North America species comparison

branched from bases, pubescent.

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

opposite;

petioles 1–5 mm;

blades 3-nerved from bases, oblong, obovate, or ovate, (15–)30–80 × 10–35 mm, bases cordate or truncate, margins crenate-serrate, apices acute to obtuse, faces sparsely pubescent and 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.

2–15 mm, hispid to hirsute.

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

cylindric to narrowly campanulate, 8–12 mm.

cylindric to campanulate, 8–12 mm.

10–16;

corollas purplish, 7–9 mm.

13–25;

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

17–20 in 3–5 series, pale green, often purplish, 5–9-striate, unequal, margins narrowly scarious-ciliate (apices acute to acuminate);

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

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).

erect, usually in loose, paniculiform arrays, sometimes borne singly.

in loose, paniculiform arrays.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

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

pappi of 28–40 smooth or barbellulate bristles.

= 18.