Flora of North America species comparison

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

erect, usually sparsely strigose, sometimes hispid as well.

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).

mostly cauline; opposite (proximal) or alternate;

petioles 0–0.2 cm;

blades (± 3-nerved distal to bases) narrowly lanceolate to linear, 5–11.5 × 0.15–1 cm, bases cuneate, margins entire (often ± ciliate proximally), faces sparsely strigose or scabrous to glabrate, sparsely gland-dotted.

0.5–10 cm.

1–10 cm.

hemispheric, 10–20 mm diam.

hemispheric, 5–6 mm diam.

8–13;

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

7–8;

laminae (10–)15–20 mm.

75+;

corollas 6–7 mm, lobes reddish;

anthers dark, appendages dark (style branches yellow).

30+;

corollas 2.8–3.5 mm, lobes yellow;

anthers dark, appendages dark.

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

11–17, linear, 5.5–8 × 0.8–1.3 mm (margins sparsely hispido-ciliate, hairs 0.5–1.2 mm), apices acute to acuminate, abaxial faces glabrate, not gland-dotted.

3–15+.

usually 5+.

3–4 mm, glabrous or distally puberulent;

pappi of 2 aristate scales 2.5–2.7 mm.

2.2–2.3 mm, sparsely puberulent (bases and apices);

pappi 0.

9–10 mm, entire or ± 3-toothed.

(ovate) 3.5–4.6 mm, entire (1-toothed).

= 34.

= 34.