Flora of North America species comparison

branched, pubescent, gland-dotted.

branched, pubescent.

mostly alternate, sometimes opposite;

petioles 0–5 mm;

blades 3-nerved from bases (venation raised, reticulate), elliptic to lanceolate or ovate to subdeltate, 20–70 × 7–20 mm, bases ± cuneate, margins crenate to serrate, apices acute, faces glandular-pubescent.

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, tomentose, often gland-dotted.

5–100 mm, glandular-pubescent.

narrowly cylindric, 10–13 mm.

cylindric to narrowly campanulate, 7–15 mm.

9–24;

corollas pale yellow-green, 6–8.2 mm.

6–35;

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

18–20 in 3–4(–5) series, green or purplish, 5–9-striate, unequal, margins scarious (apices acute, attenuate, obtuse, or nearly rounded);

outer ovate (lengths evenly grading to inner, margins ciliate, faces pubescent, often gland-dotted), inner narrowly lanceolate to linear-oblong (faces 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).

in paniculiform arrays.

in paniculiform or corymbiform arrays.

2.5–4 mm, densely pubescent;

pappi of 32–43 white, mostly barbellate, sometimes subplumose, 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.