Flora of North America species comparison

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

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

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, ± squarrose spines, 10–50 mm;

secondaries filiform to clavate, 2–12(–20) mm, sparsely arachnose or glabrous.

3–15 mm.

4–15 mm.

turbinate, 7–10 mm.

turbinate to campanulate, 7–9 mm.

4;

corollas cream to yellow, 9–10 mm.

5–7;

corollas pale yellow, 7.5–9 mm.

4, lanceolate to obovate.

5, ovate.

3–7.

1–3 (in axils of spines).

2.5–3.5 mm, hirsute;

pappi of 100–130 bristles 6–8 mm.

4.5–5.5 mm, densely pilose (hairs 6–14 mm);

pappi of ca. 25, subulate to setiform scales 6–7.5 mm.

= 60, 62, 120, 180.