Flora of North America species comparison

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

1–10+, erect (wandlike), unarmed, evenly pannose.

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

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

primaries linear-filiform, flaccid, 10–40 mm;

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

2–12 mm.

1–3 cm.

turbinate to cylindric, 6–9 mm.

turbinate, 8–9 mm.

4;

corollas bright yellow, 8–10 mm.

4–5;

corollas pale yellow, ca. 8 mm.

4, oblong.

4–5, oval-elliptic.

4–6.

4–6.

4–6 mm, densely hirsute;

pappi of 75–100 bristles 9–10 mm.

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

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

= 60.

= 60.