Flora of North America species comparison

branched from bases, pubescent.

densely branched, glandular-puberulent.

opposite;

petioles 1–5 mm;

blades 3-nerved from bases, oblong, obovate, or ovate, (15–)30–80 × 10–35 mm, bases cordate or truncate, margins crenate-serrate, apices acute to obtuse, faces sparsely pubescent and gland-dotted.

opposite or alternate;

petioles 0–3 mm;

blades 3–4-nerved from bases (veins prominent), deltate, lanceolate, or ovate, 10–50 × 5–25 mm, bases acute to truncate or cordate, margins usually sharply dentate or dentate-serrate, rarely entire, apices acute to acuminate, faces glabrous or strigose and minutely glandular-puberulent.

2–15 mm, hispid to hirsute.

10–70 mm, hispid to hispidulous and stipitate-glandular.

cylindric to narrowly campanulate, 8–12 mm.

cylindric to broadly campanulate, 9–15 mm.

10–16;

corollas purplish, 7–9 mm.

40–90;

corollas pale yellow-green or cream, often purple-tinged, 6–8 mm.

17–20 in 3–5 series, pale green, often purplish, 5–9-striate, unequal, margins narrowly scarious-ciliate (apices acute to acuminate);

outer lance-ovate (sparsely pubescent), inner narrowly lanceolate (glabrous).

24–33 in 3–4 series, green, 3–16-striate, subequal or unequal, margins narrowly scarious (apices acute to acuminate);

outer (often bright green, 4–16-striate) lance-linear, linear-ovate, or broadly ovate, inner (pale green, 3–4-striate) linear or narrowly lanceolate (often chartaceous, scabrellous, often glandular).

erect, usually in loose, paniculiform arrays, sometimes borne singly.

in open, paniculiform arrays.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

3–5.5 mm, scabrellous;

pappi of 18–25 smooth or barbellulate bristles.

= 18.