Flora of North America species comparison

1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose.

usually 1, rarely 2–3, clustered, glabrous.

petiolate;

blades narrowly elliptic to oblanceolate, 30–90+ × 10–20+ mm, bases tapering, margins serrate to crenate-serrate (apices rounded to acute, faces glabrous).

(relatively thick and turgid) petiolate (petioles broad-winged or narrow, delicate);

blades ovate, ovate-orbiculate, oblong-lanceolate, orbiculate, suborbiculate, reniform, or subreniform, 10–50+ × 10–40 mm, bases tapering or subcordate to abruptly contracted, margins entire or crenate.

gradually reduced (petiolate or sessile; elliptic to lanceolate, often pinnatifid).

gradually reduced (proximal and mid sometimes as large as or larger than basal, sessile, oblanceolate to obovate, sometimes lyrate, sometimes auriculate and/or clasping, subentire to irregularly dissected; distal usually sessile, bractlike, sometimes larger).

bracteate, distally tomentose.

inconspicuously bracteate or ebracteate, glabrous.

8 or 13;

corolla laminae 5–7+ mm.

8 or 13;

corolla laminae (deep yellow to orange) 5–8+ mm.

45–60+;

corolla tubes 1.5–2 mm, limbs 1.5–2 mm.

45–60+;

corolla tubes 2–3 mm, limbs 2.5–3.5 mm.

13 or 21, light green, 3–5 mm, glabrous.

(8–)13 or 21, green (tips cyanic), 5–7+ mm, glabrous.

inconspicuous.

conspicuous (bases of bractlets swollen).

20–70(–100+) in corymbiform arrays.

1–6+ in congested, corymbiform or subumbelliform arrays.

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

0.75–1.5 mm, glabrous, pappi 3–4 mm.

= 44.

= 46.