Flora of North America species comparison

segments green to dark green, 8–20(–31) cm;

tubercles salient, moderately broad, 1.5–2.5 cm.

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.

14–18(–23) per areole, yellow to deep red-brown, aging gray, not baggy sheathed;

major abaxial spines usually deflexed, spreading.

in inconspicuous to small adaxial tuft, yellow to brown, 0.5–2 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 yellow, bronze, or brick red.

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.

spiny;

areoles 14–22(–26).

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.

= 22.