Flora of North America species comparison

(ascending) branched, pubescent, sometimes glandular-pubescent.

branched, pubescent.

alternate;

petioles 4–10 mm;

blades 3-nerved from bases, rhombic-ovate, 10–40 × 10–20 mm, bases cuneate, margins laciniate-dentate, apices acute to obtuse, faces glabrate or 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.

5–40 mm, pubescent.

5–100 mm, glandular-pubescent.

narrowly campanulate, 7–11 mm.

cylindric to narrowly campanulate, 7–15 mm.

16–17;

corollas cream, 6–7 mm.

6–35;

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

35–40 in 5–7 series, 3–5-striate, unequal, (glabrous, ± chartaceous) margins narrowly scarious (apices acute to acuminate);

outer ovate, inner lanceolate.

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 dense, paniculiform arrays.

in paniculiform or corymbiform arrays.

2–3 mm, pubescent;

pappi of 18–24 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.