Flora of North America species comparison

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

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

primaries forming straight or recurved spines, 5–25 mm;

secondaries spatulate, 10–20 mm, tomentose to nearly glabrous.

primaries forming straight, ± squarrose spines, 10–50 mm;

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

2–12 mm.

4–15 mm.

turbinate to cylindric, 6–9 mm.

turbinate to campanulate, 7–9 mm.

4;

corollas bright yellow, 8–10 mm.

5–7;

corollas pale yellow, 7.5–9 mm.

4, oblong.

5, ovate.

4–6.

1–3 (in axils of spines).

4–6 mm, densely hirsute;

pappi of 75–100 bristles 9–10 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.