Flora of North America species comparison

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

branched, 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 or alternate;

petioles 3–20 mm;

blades 3-nerved from bases, deltate to lanceolate, 10–60 × 7–50 mm, bases cordate to truncate, margins crenate-dentate, apices acute, faces sparsely to densely pubescent, gland-dotted.

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

20–50 mm, glandular-pubescent.

cylindric to campanulate, 8–12 mm.

cylindric to broadly campanulate, 12–14 mm.

13–25;

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

± 60;

corollas pale yellow, often purple-tinged, 9–10 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).

40–60 in 5–6 series, greenish, 4–6-striate, unequal, margins narrowly scarious (apices acute to acuminate);

outer narrowly lanceolate (glandular-pubescent), inner lanceolate (glabrous or tomentulose).

in loose, paniculiform arrays.

borne singly or in open, paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

4–5 mm, hispidulous or glabrate;

pappi of 32–36 white, barbellate bristles.