Flora of North America species comparison

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

1 or 3–5, clustered (often scapiform), usually floccose, lanate-tomentose, or canescent, sometimes glabrate.

petiolate;

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

(either of two forms): usually (1) sessile, sometimes petiolate;

blades narrowly lanceolate to elliptic, 15–40+ × 5–25 mm, bases tapering, margins entire or dentate toward apices (often revolute), sometimes (2) petiolate;

blades ovate to orbiculate, 10–20 × 5–15 mm, bases tapering to abruptly contracted, margins entire or wavy, sometimes dentate toward apices.

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

abruptly reduced (bractlike).

bracteate, distally tomentose.

inconspicuously bracteate, glabrous or densely hairy.

8 or 13;

corolla laminae 5–7+ mm.

0, 8, or 13;

corolla laminae 5–10 mm.

45–60+;

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

30–50+;

corolla tubes 2.5–3.5 mm, limbs 3–4 mm.

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

13 or 21, green (tips sometimes cyanic), 4–10 mm, glabrous or hairy.

inconspicuous.

conspicuous (bractlets often cyanic).

20–70(–100+) in corymbiform arrays.

1–5(–8) in cymiform to subumbelliform arrays.

0.75–1 mm, hirsute on ribs;

pappi 2.5–3 mm.

1.5–2 mm, glabrous;

pappi 5–6 mm.

= 44.

= 44, 46.