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.

0–2(–3) per areole, sparsely distributed along stem, usually deflexed, pale yellow or red-brown aging black, stout, the longest 0.8–3.5(–5) cm;

sheaths loose fitting, yellowish brown.

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

in adaxial tuft and marginal, encircling areole, pale yellow.

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 green- or orange-bronze, spatulate, 17–20 mm, apiculate;

filaments dark green-bronze;

anthers yellow;

style whitish basally to light orange apically;

stigma lobes very pale green.

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.

green, becoming yellowish apically, sometimes tinged red to purplish at areoles, commonly sterile, then narrow, tuberculate, to 2.5 cm, fertile ones stipitate, obconic, 20–50 × 15–35 mm, fleshy, becoming smooth, spineless;

umbilicus 3–4 mm deep;

areoles 15–17(–34).

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.

pale yellow, angularly circular to oblong, thick, 3–5 mm diam., lumpy;

girdle smooth, broad, not protruding.

= 66.