Flora of North America species comparison

segments usually alternate, gray-green or purplish, 2–8 × 0.3–0.5 cm;

tubercles linear, drying as elongate, riblike wrinkles, 1.1–2(–3) cm;

areoles broadly elliptic, (1–)1.5–3.5 × 0.7–2 mm;

wool white to yellow, aging gray.

11–18(–28) per areole, at most areoles, moderately to wholly obscuring stems, spreading or erect, whitish, pale yellow to pinkish tan to reddish, aging brown or black, terete or abaxial spines basally flattened, grading in length, the longest porrect to reflexed, 2–2.5(–3.5) cm, with 0–6 bristlelike spines at areole margins;

sheaths slightly baggy, whitish becoming yellow to golden apically.

0–1(–3) per areole, usually in apical areoles to well distributed, erect, flexible, straight or arching upward or downward, red-brown with gray to whitish coat, tips yellow, aging red-brown, terete, angular-flattened basally, the longest (4–)14–45 mm;

sheaths gray to purple-gray with yellow to red-brown tips or yellow throughout.

in thin adaxial crescent, yellow or tan to rusty, 0.5–6 mm.

in adaxial tuft or crescent to encircling areole, yellow or reddish brown, 1–3(–5) mm.

inner tepals greenish yellow, often with tips reddish abaxially, spatulate, 22–30 mm, apiculate to emarginate-apiculate;

filaments yellow-green to green;

anthers yellow to orange-yellow;

style cream to yellow, sometimes basally greenish;

stigma lobes greenish cream, cream or yellow.

inner tepals pale yellow to greenish yellow, sometimes tipped red, narrowly obovate, 5–8 mm, acute, apiculate;

filaments greenish yellow;

anthers yellow;

style yellow;

stigma lobes greenish yellow.

yellowish, drying tan, globose, tuberculate, budlike with spines similar to those of stem segments but slightly shorter, often reflexed;

proximal tubercles slightly elongated if fruits fertile;

umbilicus 4–5 mm deep;

areoles 22–32(–40).

occasionally proliferating, yellow to scarlet (rarely green, sometimes tinged purple, becoming yellow), sometimes stipitate, obovoid, 9–15(–27) × 6–7(–12) mm, fleshy, smooth, spineless;

umbilicus 2–4 mm deep;

areoles 16–20.

pale yellow, angular-suborbicular, flattened to slightly warped, 4.5–6 × 4.5–5.7 mm, sides with 3–5 depressions;

girdle smooth, not protruding.

pale yellow, suborbicular to squarish and crenate in outline, warped, 3–4.5 mm diam., sides smooth, each with 1–3 large depressions;

girdle smooth or with very narrow ridge.

= 22.

= 22, 33, 44.