Flora of North America species comparison

1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose.

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

(and proximal cauline, relatively thick and turgid) petiolate;

blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).

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).

gradually reduced (± petiolate or sessile).

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

bracteate, glabrous or sparsely tomentose.

ebracteate or bracteate, glabrous.

8–10(–13);

corolla laminae 5–8+ mm.

(10–)13;

corolla laminae 5–7+ mm.

45–60+;

corolla tubes 3–3.5 mm, limbs 4–5 mm.

60–75+;

corolla tubes 2–3 mm, limbs 2–3 mm.

13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.

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

inconspicuous.

usually 0, sometimes inconspicuous.

4–15+ in corymbiform arrays.

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

1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;

pappi 5–6 mm.

1–1.5 mm, hirsute on ribs;

pappi 3–5 mm.

= 46.

= 36.