Flora of North America species comparison

1–3+, erect, unarmed, pannose but for glabrescent streaks.

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

primaries linear-subulate, ascending to appressed, 5–20 (× 1+) mm, sparsely floccose, sometimes glabrate;

secondaries linear-filiform to clavate, 3–15 mm, glabrous.

primaries forming straight, ascending spines, 20–30 mm;

secondaries oblanceolate to spatulate, 10–30 mm, tomentose to sericeous.

3–15 mm.

5–12 mm.

turbinate, 7–10 mm.

turbinate, 8–10 mm.

4;

corollas cream to yellow, 9–10 mm.

4–5;

corollas pale yellow, 10–12 mm.

4, lanceolate to obovate.

4–5, narrowly ovate.

3–7.

4–7.

2.5–3.5 mm, hirsute;

pappi of 100–130 bristles 6–8 mm.

5–8 mm, densely pilose or villous;

pappi of 100–150 bristles 9–12 mm.

= 60, 62, 120, 180.

= 60.