Flora of North America species comparison

branched, puberulent, gland-dotted.

branched, pubescent.

alternate;

petioles 10–50 mm;

blades 3-nerved from bases, deltate or rhombic-ovate, 50–100 × 20–50 mm, bases acute to truncate, margins crenate or coarsely dentate, apices long-acuminate, abaxial faces sparsely villous, gland-dotted, adaxial faces glabrous or sparsely pubescent, often 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.

4–6 mm, puberulent, sparsely gland-dotted.

5–100 mm, glandular-pubescent.

cylindric to campanulate, 7–10 mm.

cylindric to narrowly campanulate, 7–15 mm.

13–20;

corollas yellowish, 5.3–6.5 mm.

6–35;

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

22–26 in 4–7 series, 3–5-striate, unequal, margins scarious (apices obtuse to acute);

outer ovate to lanceolate (often purple-tinged, glabrous or puberulent), inner linear to oblong (greenish, 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.

2–2.5 mm, sericeous;

pappi of 26–32 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.