Flora of North America species comparison

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

branched from bases, 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.

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.

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

2–15 mm, hispid to hirsute.

cylindric to campanulate, 8–12 mm.

cylindric to narrowly campanulate, 8–12 mm.

13–25;

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

10–16;

corollas purplish, 7–9 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).

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).

in loose, paniculiform arrays.

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

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

pappi of 28–40 smooth or barbellulate bristles.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

= 18.