Flora of North America species comparison

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

usually 1 or 2–5, rarely 6–20, clustered, glabrous but for tomentose leaf axils.

(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.

petiolate;

blades elliptic-ovate, broadly oblanceolate, or lyrate (lateral lobes 3–9 pairs), 40–70 × 15–25 mm, bases tapering, margins irregularly and deeply parted or lobed (apices incised).

abruptly reduced (bractlike).

usually gradually, sometimes abruptly, reduced (petiolate or sessile; narrowly elliptic to oblanceolate, pinnatifid).

inconspicuously bracteate, glabrous or densely hairy.

ebracteate or bracteate, glabrous.

0, 8, or 13;

corolla laminae 5–10 mm.

(10–)13;

corolla laminae 5–7+ mm.

30–50+;

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

60–75+;

corolla tubes 2–3 mm, limbs 2–3 mm.

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

13 or 21, light green, 4–6+ mm, glabrous.

conspicuous (bractlets often cyanic).

usually 0, sometimes inconspicuous.

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

3–20+ in open or congested, corymbiform arrays, frequently subtended by smaller arrays from leaf axils.

1.5–2 mm, glabrous;

pappi 5–6 mm.

1–1.5 mm, hirsute on ribs;

pappi 3–5 mm.

= 44, 46.

= 36.