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.

6–8 per areole (1–2 bristlelike spines) increasing with time, well distributed along stem, slightly interlacing with spines of adjacent areoles, short;

abaxial spines usually reflexed, whitish, pinkish to red-brown, lightly flattened, the longest 10–18 mm;

adaxial spines erect or spreading, rich red-brown, gray coated basally, subterete, 6–11 mm;

sheaths grayish, tipped brown or yellow to golden Glochids in small adaxial tuft or crescent, dark yellow, to 1 mm.

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

inner tepals yellow-green, yellow to gold or bronze, or red to rose or magenta, spatulate, apiculate;

filaments yellowish green;

anthers yellow;

style whitish to pale bronze;

stigma lobes whitish.

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.

often proliferating, yellowish green or tinged red to purple, often stipitate, obovate, 25–40 × 10–20 mm, leathery-fleshy, tuberculate or smooth, essentially spineless;

tubercles prominent, at first, subequal in length or proximal ones longer, fertile ones swelling and becoming smooth;

umbilicus to 9 mm deep;

areoles 20–30.

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.

yellowish, polygonal in outline, warped, 3.5–5.5 × 2.5–5 mm, sides nearly flattened with depressions and protrusions to angular subspheric;

girdle smooth or in a groove.

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.