Flora of North America species comparison

erect, usually hispid.

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

mostly cauline; mostly alternate;

petioles 2–20 cm;

blades lance-ovate to ovate, 10–40 × 5–40 cm, bases cuneate to subcordate or cordate, margins serrate, abaxial faces usually ± hispid, sometimes gland-dotted.

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).

2–20 cm.

0.5–10 cm.

hemispheric or broader, 15–40(–200+) mm diam.

hemispheric, 10–20 mm diam.

(13–)17–30(–100+);

laminae 25–50 mm.

8–13;

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

150+(–1000+);

corollas 5–8 mm (throats ± bulbous at bases), lobes usually reddish, sometimes yellow;

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

75+;

corollas 6–7 mm, lobes reddish;

anthers dark, appendages dark (style branches yellow).

20–30(–100+), ovate to lance-ovate, 13–25 × (3–)5–8 mm, (margins usually ciliate) apices abruptly narrowed, long-acuminate, abaxial faces usually hirsute to hispid, rarely glabrate or glabrous, usually gland-dotted.

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

1–9.

3–15+.

(3–)4–5(–15) mm, glabrate;

pappi of 2 lanceolate scales 2–3.5 mm plus 0–4 obtuse scales 0.5–1 mm.

3–4 mm, glabrous or distally puberulent;

pappi of 2 aristate scales 2.5–2.7 mm.

9–11 mm, 3-toothed (middle teeth long-acuminate, glabrous or hispid).

9–10 mm, entire or ± 3-toothed.

= 34.

= 34.