Flora of North America species comparison

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

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

primaries forming recurved spines, 5–25 mm;

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

primaries forming ascending spines, 10–30 mm;

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

5–30 mm.

1–4 mm.

hemispheric, 8–12 mm.

turbinate, ca. 7 mm.

5–8;

corollas pale to bright yellow, 6–10 mm.

5;

corollas pale yellow, ca. 9 mm.

4–6, oblong to ovate.

5, oval-elliptic.

1–2 (in axils of spines).

2–5.

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

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

2.5–3.5 mm, glabrous;

pappi of 75–100 bristles ca. 8 mm.

= 60.

= 60.