Flora of North America species comparison

erect, 5–30 dm, scabrous to scabro-hispidulous.

(green) erect, hispid to hispidulous.

cauline; mostly alternate;

petioles 0–2 cm;

blades (light green to gray-green, 1-nerved, conduplicate) lanceolate, 10–30 × 2–5.5 cm, bases cuneate, margins usually entire, sometimes serrulate, abaxial faces scabrous to scabro-hispid, gland-dotted.

cauline; usually opposite or alternate, rarely whorled;

petioles 0–1 cm;

blades (1- or 3-nerved) lanceolate to elliptic or lance-ovate, 4–15 × 0.5–6 cm, bases rounded to cuneate, margins entire or serrulate (often undulate, often ± revolute), faces ± scabrous to tomentulose and gland-dotted (abaxial) or scabrous (adaxial).

1–11 cm.

2–15 cm.

hemispheric, 13–28 mm diam.

± hemispheric, 12–19 × 7–9 mm.

10–25;

laminae (15–)25–40 mm.

10–20;

laminae 20–25 mm (abaxial faces gland-dotted).

75+;

corollas 5–7 mm, lobes yellow;

anthers dark brown or black;

appendages usually yellow, sometimes partly dark.

90+;

corollas 4–5 mm, lobes usually reddish, sometimes yellow;

anthers dark brown or black, appendages dark (style branches yellow).

30–40, lanceolate, 14–20 × 2–3 mm, (margins ciliate) apices acute to attenuate, abaxial faces canescent, gland-dotted.

33–38, lanceolate, 5–9 × 1.5–3 mm, apices (at least outer) obtuse, abaxial faces hispidulous to hispid, gland-dotted.

(1–)3–15 (often in racemiform to spiciform arrays).

1–6.

3–4 mm, glabrate;

pappi of 2 aristate scales 3–4.1 mm.

2.5–3 mm, glabrous;

pappi of 2 aristate scales 1.5–2.2 mm.

7–11 mm, entire or 3-toothed (apices greenish, mucronate, hairy).

4.5–6 mm, entire or weakly 3-toothed (apices purplish, glabrate to puberulent, often gland-dotted).

= 34.

= 34.