Flora of North America species comparison

erect, glabrous.

erect, glabrous (glaucous).

cauline; opposite or alternate;

petioles 0.3–3 cm;

blades (greenish, at least abaxially, 3-nerved at bases) lanceolate, 7.2–15.5 × 1.3–4 cm, bases cuneate, margins entire or serrate, abaxial faces tomentulose, densely gland-dotted.

mostly cauline; opposite (proximal) or alternate;

petioles 1–3 cm;

blades (light to dark green, abaxially whitish, 3-nerved), lanceolate to lance-ovate, 9–18 × 2.5–7 cm, bases abruptly narrowed, margins serrate, faces glabrous (abaxial) or sparsely scabrous (adaxial), not gland-dotted (abaxial glaucous).

1–3(–8) cm.

0.5–8 cm.

cylindric, 5–7 mm diam.

hemispheric, 8–9 mm diam.

5–8;

laminae 10–14 mm.

5–8;

laminae 12–14 mm (abaxial faces not gland-dotted).

15–22;

corollas 4–5.5 mm, lobes yellow;

anthers dark, appendages dark.

20–35;

corollas 5–6 mm, lobes yellow;

anthers dark, appendages dark.

12–17, lance-linear, 3–6.5 × 1.5–2.5 mm, (margins ciliate) apices acuminate, abaxial faces glabrate, not gland-dotted.

12–15, lanceolate to ovate, 8–9 × 1.8–3 mm, (margins ciliate) apices acuminate.

(1–)3–15+.

3–15+.

3.5–4.2 mm, glabrous;

pappi of 2 aristate scales 1.5–2.2 mm.

3.5–3.8 mm, glabrous;

pappi of 2 aristate scales 3.2–3.5 mm.

5–7 mm, 3-toothed (apices hairy).

6.2–7.5 mm, 3-toothed (apices hairy).

= 34.

= 34.