Flora of North America species comparison

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.

(6–)10–17(–22) per areole, accompanied by 0–5 short bristlelike spines at areole margins, at most areoles, most prominent in adaxial ones, much interlaced with those of adjacent areoles, obscuring stems, sometimes brushlike;

major abaxial spines whitish, yellow to tan, usually subterete to flattened, spreading to deflexed, the longest 20–30(–45) mm;

major adaxial spines erect or spreading, white, pale yellow, or tan to brown (rarely deep red-brown), terete, the longest 22–35(–50) mm;

sheaths whitish with yellow to golden tips, baggy.

conspicuous in broad adaxial crescent, yellow, 3–4(–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 light green to yellow-green, sometimes suffused with maroon or rose, spatulate, 20–23 mm, emarginate-apiculate;

filaments greenish white or yellow, sometimes suffused with bronze or rose, but not red;

anthers yellow;

style and stigma lobes whitish, cream to light green.

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.

tan at maturity, obconic to subspheric, 13–23 × 11–20 mm, dry, tuberculate, densely spiny, sometimes burlike, with apical flange around deep umbilicus;

basal tubercles not markedly longer than distal ones;

areoles 16–24(–36).

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, angular to squarish in outline, warped, 4–6 × 3.5–5 mm, sides smooth, each with 2–4 large depressions;

girdle smooth (rarely with very narrow ridge).

= 22.

= 22.