Flora of North America species comparison

erect, scabro-hispid to hirsute (sometimes glaucous).

(usually yellow-brown or greenish, sometimes glaucous) erect, glabrous, hispid, ± hirsute, or scabrous.

mostly cauline; opposite or alternate proximally, usually alternate distally;

petioles 2–8 cm (often ± winged);

blades (3-nerved from near bases) lanceolate to ovate, 10–23 × 7–15 cm, bases broadly to narrowly cuneate, margins entire or serrate (flat), abaxial faces puberulent or hirsutulous to tomentulose and gland-dotted (abaxial) or ± scabrous (adaxial).

cauline; all or mostly opposite to mostly alternate;

petioles 0.5–1.5 cm;

blades light to dark green, 3-nerved (distal to bases) ± lanceolate to ± ovate, 4–20 × 0.8–4 cm, bases cuneate, margins entire or ± serrate (flat), abaxial faces hispid to hispidulous or tomentulose to villous-tomentose, gland-dotted.

1–15 cm.

1–18 cm.

hemispheric, (10–25 ×) 8–12 mm.

hemispheric, 10–20 mm diam.

10–20;

laminae 25–40 mm.

10–21;

laminae 20–25 mm (abaxial faces not gland-dotted).

60+;

corollas 6–7 mm, lobes yellow;

anthers dark brown or black, appendages dark or yellowish.

60+;

corollas 5–7 mm, lobes yellow;

anthers dark brown to black, appendages yellow.

(often dark green, drying nearly black) 22–35 (bases appressed, apices ± spreading, sometimes reflexed in fruit), lanceolate, 8.5–15 × 2–4 mm (subequal), (margins ciliate) apices acuminate, abaxial faces hispidulous or puberulent, gland-dotted.

30–38 (loose, spreading), lanceolate to lance-ovate, 8–16 × 1.5–3 mm, (margins ciliate) apices acute to acuminate, abaxial faces usually ± strigose, rarely glabrate, not gland-dotted.

3–15.

1–6.

5–7 mm, glabrous or distally hairy;

pappi of 2 aristate scales 1.9–3 mm plus 0–1 deltate scales 0.5–0.8 mm.

3–5 mm, glabrate;

pappi of 2 aristate scales 2.2–4.5 mm plus 0–2 lanceolate scales 0.5–1 mm.

8–9 mm, 3-toothed (apices hairy).

8–12 mm, 3-toothed.

= 102.

= 34 (subspecies unknown).