Flora of North America species comparison

1–5+, erect, spiny, pannose but for glabrescent streaks.

1–5+, erect, spiny, unevenly pannose with glabrescent streaks.

primaries forming straight or recurved spines, 5–25 mm;

secondaries spatulate, 10–20 mm, tomentose to nearly glabrous.

primaries forming ascending spines, 10–30 mm;

secondaries filiform to clavate, 3–20 (× 1+) mm, glabrous or nearly so.

2–12 mm.

1–4 mm.

turbinate to cylindric, 6–9 mm.

turbinate, ca. 7 mm.

4;

corollas bright yellow, 8–10 mm.

5;

corollas pale yellow, ca. 9 mm.

4, oblong.

5, oval-elliptic.

4–6.

2–5.

4–6 mm, densely hirsute;

pappi of 75–100 bristles 9–10 mm.

2.5–3.5 mm, glabrous;

pappi of 75–100 bristles ca. 8 mm.

= 60.

= 60.