Flora of North America species comparison

erect, hispid to strigoso-hispid proximally, glabrate distally.

erect, glabrous or glabrate.

basal and cauline; mostly opposite;

petioles 0.1–5.5 cm;

blades ovate to broadly ovate or suborbiculate, 7–15 × 4.5–15 cm, bases rounded to truncate or ± cuneate, margins entire or crenate to serrate, abaxial faces usually scabrous, sometimes ± strigose (hairs on midribs to 1 mm), not gland-dotted (cauline 9+ pairs proximal to heads, smaller).

cauline; mostly opposite, sometimes alternate (distal);

petioles 1–3 cm;

blades (light to dark green, 3-nerved distal to bases) lanceolate to lance-ovate or ovate, 7–18 × 2–10 cm, bases subcordate to ± cuneate, margins entire to ± serrate, abaxial faces glabrous or tomentulose, usually densely gland-dotted.

0.5–10 cm.

1–9 cm.

hemispheric, 10–20 mm diam.

cylindric to hemispheric, 8–20 mm diam.

8–13;

laminae 15–20 mm (abaxial faces not gland-dotted).

10–20;

laminae ca. 12–20(–30) mm.

75+;

corollas 6–7 mm, lobes reddish;

anthers dark, appendages dark (style branches yellow).

35+;

corollas 5.5–6.5 mm, lobes yellow;

anthers dark, appendages dark or reddish brown.

16–23, oblong to obovate, 8–10 × 3–5 mm, (margins ciliolate) apices obtuse to acute, sometimes mucronate, abaxial faces glabrous or glabrate.

18–25 (erect, loose, or squarrose), lanceolate, 5.5–10 × 1.5–3 mm (equaling or slightly surpassing discs), (margins usually ciliate) apices acute to acuminate, abaxial faces glabrous or hispidulous, usually not gland-dotted.

3–15+.

3–15.

3–4 mm, glabrous or distally puberulent;

pappi of 2 aristate scales 2.5–2.7 mm.

4–5.5 mm, glabrate;

pappi of 2 aristate scales (1–)2–2.5 mm.

9–10 mm, entire or ± 3-toothed.

5.3–6.5 mm, 3-toothed.

= 34.

= 68, 102.