Flora of North America species comparison

branched from bases, pubescent.

branched, pubescent.

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.

mostly opposite (alternate in vars. gracillima and texana);

petioles 0–10 mm;

blades 1- or 3-nerved from bases, lanceolate, lance-linear, lance-ovate, lance-rhombic, linear, or oblong, 25–100 × 0.5–40 mm, bases acute, margins entire or ± dentate (often revolute), apices obtuse to acuminate, faces glandular-pubescent.

2–15 mm, hispid to hirsute.

5–100 mm, glandular-pubescent.

cylindric to narrowly campanulate, 8–12 mm.

cylindric to narrowly campanulate, 7–15 mm.

10–16;

corollas purplish, 7–9 mm.

6–35;

corollas pale yellow, yellow-green, pinkish lavender, or maroon, 4.5–6 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).

22–26 in 4–6 series, green to stramineous, sometimes purple-tinged, 3–7-striate, unequal, margins scarious (often ciliate);

outer ovate to lance-ovate (puberulent, often densely gland-dotted, apices acute to acuminate), inner lanceolate (± gland-dotted, apices obtuse to aristate).

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

in paniculiform or corymbiform arrays.

3–4 mm, densely pubescent to velutinous;

pappi of 40–52 white, barbellate bristles.

2.7–5.5 mm, glabrous or strigose, sometimes hispidulous or velutinous and/or gland-dotted;

pappi of 20–28 white or tawny, usually plumose or subplumose, sometimes barbellate, bristles.

= 18.