Flora of North America species comparison

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

1–5+, erect or spreading, spiny, evenly pannose.

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

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

primaries forming recurved spines, 5–25 mm;

secondaries linear-filiform to spatulate, 3–25 (× 1–2) mm, glabrous or glabrescent.

2–12 mm.

5–30 mm.

turbinate to cylindric, 6–9 mm.

hemispheric, 8–12 mm.

4;

corollas bright yellow, 8–10 mm.

5–8;

corollas pale to bright yellow, 6–10 mm.

4, oblong.

4–6, oblong to ovate.

4–6.

1–2 (in axils of spines).

4–6 mm, densely hirsute;

pappi of 75–100 bristles 9–10 mm.

6–8 mm, copiously pilose (hairs 9–12 mm);

pappi of ca. 25, subulate scales 6–9 mm.

= 60.

= 60.