Flora of North America species comparison

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

1–5+, erect (wandlike), unarmed, evenly pannose.

primaries forming ascending spines, 10–30 mm;

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

primaries lance-linear, stiff, pungent, not spinose, 20–60 (× 2–5) mm, tomentose;

secondaries (seldom present) spatulate, 8–15 mm, tomentose.

1–4 mm.

3–8 mm.

turbinate, ca. 7 mm.

hemispheric, 8 mm.

5;

corollas pale yellow, ca. 9 mm.

5–9;

corollas yellow to brownish, 8–9 mm.

5, oval-elliptic.

5–6, oblanceolate.

2–5.

3–6.

2.5–3.5 mm, glabrous;

pappi of 75–100 bristles ca. 8 mm.

ca. 4 mm, copiously pilose (hairs 6–10 mm);

pappi 0.

= 60.

= 60.