Flora of North America species comparison

(0–)7–13(–20) per areole, at most areoles, rarely obscuring stems, yellow to orange-brown with yellow tips, aging dark gray, subequal or 1–6(–7) much longer to 3 cm;

sheaths whitish or gold to brown, moderately loose.

yellow-tan to red-brown in dense adaxial crescent and scattered, stouter ones at basal margins.

inner tepals yellow to greenish yellow;

outer ones tipped red, 15–30 mm;

filaments green or yellow;

anthers yellow;

style light green or cream-white (rarely pinkish) apically;

stigma lobes cream-white to yellow.

green to yellowish, drying gray-tan, short top-shaped to subspheric, 15–32 × 13–26 mm, leathery-dry, tuberculate, few spined or spineless;

proximal tubercles longest;

umbilicus deep;

rim slightly flanged;

areoles 13–30.

tan, squarish to angular in outline, warped, (4–)5–7 × 4–5 mm, sides with 2–4 deep depressions;

girdle smooth.