Flora of North America species comparison

6–20(–30+) per areole, often accompanied by 0–5 short bristlelike spines at areole margins, usually in distal areoles;

major abaxial spines deflexed to divergent, subterete to flattened;

major adaxial spines ascending-divergent, terete, yellow or tan to deep red-brown, aging gray, the central spine longest, 12–30(–38) mm;

sheaths white to grayish with yellow to golden tips, baggy to tight fitting.

(5–)8–15(–30) per areole or spineless to nearly spineless, usually at most areoles, not obscuring stems, spreading, straight or slightly curved, silver to yellow to usually ± red or tan to brown, stout, terete or sometimes flattened basally, 8–30(–40) mm subequal;

sheaths silver to yellow to usually tan to dirty white, yellow tipped.

in inconspicuous to small adaxial tuft, yellow to brown, 0.5–2 mm.

in dense adaxial tuft, pale yellow, 0.5–3 mm.

inner tepals bright yellow to bronze to brick red, spatulate, 20–30 mm, apiculate-emarginate;

filaments red;

anthers yellow;

style and stigma lobes white to light green.

inner tepals dark pink to magenta to red-magenta, obovate, apiculate, 15–35 mm;

filaments green basally to pink to magenta distally;

anthers yellow;

style light green basally or pink to red-magenta apically;

stigma lobes green or cream.

tan at maturity, obconic to ellipsoid, 15–35 × 15–20 mm, dry, tuberculate, densely to sparsely spiny (rarely spineless), with apical flange above shallow umbilicus;

basal tubercles longest;

areoles 12–30.

not proliferating, yellow, obovoid, 24–45 × 20–40 mm, fleshy, tuberculate, spineless;

areoles 18–30;

tubercles nearly equal in length or longer in proximal portion of fruit, prominent (occasionally smooth at maturity);

umbilicus 7–14 mm deep.

pale yellow to tan, angular or squarish in outline, warped, 3.5–5 × 3–4.5 mm, sides smooth, each with 2–4 large depressions;

girdle smooth.

yellow-tan, subcircular to angled, warped, 2.5–4 mm diam., sides smooth to slightly lumpy;

girdle usually narrow, not protruding.