Flora of North America species comparison

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

branched from bases, puberulent, sparsely 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 1–2 mm;

blades obscurely 3-nerved from bases, lanceolate to lance-ovate, 5–40 × 3.5–12 mm, bases acute to cuneate, margins usually coarsely dentate, sometimes entire, apices acute, faces gland-dotted.

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

1–2 mm, puberulent, gland-dotted.

cylindric to campanulate, 8–12 mm.

cylindric to campanulate, 7–11 mm.

13–25;

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

13–20;

corollas pale green or yellow, 4.5–6.5 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).

18–22 in 5–6 series, greenish or stramineous, 3–5-striate, unequal, margins scarious (apices acute to obtuse, ciliate);

outer ovate (glandular-pubescent), inner lanceolate (gland-dotted).

in loose, paniculiform arrays.

in (elongate) paniculiform arrays.

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

pappi of 28–40 smooth or barbellulate bristles.

3.5–4 mm, usually glabrous, rarely sparsely pubescent;

pappi of 30–35 tawny, usually barbellate, sometimes subplumose, bristles.

= 18.