Flora of North America species comparison

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

branched from bases, densely pubescent, 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.

mostly opposite (sometimes alternate);

petioles 2–5 mm;

blades 3-nerved from bases, ovate to reniform, 4–15 × 7–25 mm, bases cordate to subcordate, margins crenate, apices obtuse, faces pubescent, gland-dotted.

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

0–2 mm, densely pubescent, gland-dotted.

cylindric to campanulate, 8–12 mm.

cylindric to broadly campanulate, 9–11 mm.

13–25;

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

18–33;

corollas cream to pale yellow, often red or purple-tinged, 6–7.5 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).

35–40 in 7–9 series, greenish, often purple-tinged, 3–6-striate, unequal, margins scarious (apices obtuse to acute);

outer broadly ovate to lance-ovate (puberulent; margins ciliate), inner lanceolate (glabrous).

in loose, paniculiform arrays.

in paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

3–4 mm, sparsely hispidulous;

pappi of 24–28 white or tawny, barbellate bristles.

= 18.