Flora of North America species comparison

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

1–10+, 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 linear-filiform, flaccid, 10–40 mm;

secondaries filiform-spatulate, 10–20 mm, sparsely tomentose.

1–4 mm.

1–3 cm.

turbinate, ca. 7 mm.

turbinate, 8–9 mm.

5;

corollas pale yellow, ca. 9 mm.

4–5;

corollas pale yellow, ca. 8 mm.

5, oval-elliptic.

4–5, oval-elliptic.

2–5.

4–6.

2.5–3.5 mm, glabrous;

pappi of 75–100 bristles ca. 8 mm.

5–6 mm, densely pilose (hairs 4–7 mm);

pappi of ca. 20, coarse bristles or subulate scales 3–5 mm.

= 60.

= 60.