Flora of North America species comparison

much branched, pubescent, gland-dotted.

branched from bases, pubescent.

alternate;

petioles 2–5 mm;

blades 3-nerved from bases, oblong to broadly ovate, 6–15 × 5–9 mm, bases narrowly cuneate, margins irregularly dentate, apices acute to obtuse, faces sparsely pubescent, gland-dotted.

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.

0.5–2.5 mm, glandular-viscid.

2–15 mm, hispid to hirsute.

cylindric, 6–8 mm.

cylindric to narrowly campanulate, 8–12 mm.

8–14;

corollas pale yellow-green, often purple-tinged, 4.8–5.7 mm.

10–16;

corollas purplish, 7–9 mm.

15–25 in 4–6 series, stramineous, 3–5-striate, unequal, (gland-dotted) margins scarious (apices obtuse to acute);

outer ovate, inner lanceolate.

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).

in (leafy) paniculiform or racemiform arrays.

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

2.5–3 mm, sparsely pubescent or strigose;

pappi of 24–28 tawny, barbellate bristles.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

= 18.

= 18.