Flora of North America species comparison

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

much branched from near bases, tomentose, 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 0–1 mm;

blades obscurely 3–5-nerved from bases, ovate to cordate, 7–11 × 3–8 mm, bases rounded to subcordate, margins dentate-serrate, apices obtuse, faces tomentose, gland-dotted.

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

1–5 mm, tomentose.

cylindric to campanulate, 8–12 mm.

cylindric to turbinate, 10–12 mm.

13–25;

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

20–24;

corollas pale yellow or cream, often purple-tinged, 6.2–7.5 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).

30–38 in 6–7 series, greenish, often red- or purplish-tinged, 3–6 striate, unequal, (recurved, tomentose, gland-dotted) margins scarious (ciliate, apices acute to acuminate);

outer lance-ovate, inner lanceolate.

in loose, paniculiform arrays.

(terminating elongate lateral branches) in paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

3.5–5 mm, hispidulous;

pappi of 18–24 white or tawny, barbellate bristles.

= 18.