Flora of North America species comparison

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

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

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

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

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

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

2–12 mm.

5–12 mm.

turbinate to cylindric, 6–9 mm.

turbinate, 8–10 mm.

4;

corollas bright yellow, 8–10 mm.

4–5;

corollas pale yellow, 10–12 mm.

4, oblong.

4–5, narrowly ovate.

4–6.

4–7.

4–6 mm, densely hirsute;

pappi of 75–100 bristles 9–10 mm.

5–8 mm, densely pilose or villous;

pappi of 100–150 bristles 9–12 mm.

= 60.

= 60.