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;

petioles 10–40 mm;

blades 3-nerved from bases, deltate-ovate to lance-ovate, 30–150 × 20–100 mm, bases subtruncate to cordate, margins coarsely to finely serrate, apices acuminate, abaxial faces minutely pubescent and gland-dotted, adaxial faces sparsely puberulent.

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

10–25 mm, glandular-pubescent.

cylindric to campanulate, 8–12 mm.

broadly campanulate, 10–12 mm.

13–25;

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

35–45;

corollas pale yellow-green, often purple-tinged, 6–7.2 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).

28–35 in 4–5 series, greenish, often purple-tinged, 4–7-striate, unequal to subequal, margins scarious (ciliate);

outer narrowly lanceolate to lance-ovate (glandular-pubescent, apices long-acuminate), mid lanceolate (apices acute to acuminate), inner narrowly lanceolate (apices acute to obtuse, recurved, pubescent, often gland-dotted).

in loose, paniculiform arrays.

(erect in flower and fruit) in corymbiform or paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

4.5–5.5 mm, hispidulous to glabrate;

pappi of 38–46 purple-tinged, barbellate bristles.