Flora of North America species comparison

segments not easily detached, dark dull green, often cross wrinkled when stressed, flattened, obovate to circular, 5–11 × 3.5–7.5 cm, fleshy (to flabby and cross wrinkled when stressed), tuberculate, glaucous;

areoles 5–6(–8) per diagonal row across midstem segment, oval to subcircular, 2–4 mm diam.;

wool tan.

(0–)1–4 per areole, usually in distal areoles, erect to spreading, white to red-brown, acicular, straight, terete or 1 flattened, ± stout (0.5 mm diam. at base), longest to 60 mm.

4–11 per areole, in most areoles, yellow with chalky white coat, to yellow with red-brown basal portions, aging reddish gray;

erect ones terete, stout, straight;

abaxial ones reflexed, shorter, to 12 mm;

adaxial spines spreading, longest spines 20–40 mm.

in dense tuft, pale yellow, tan to red-brown, aging brown, to 5 mm.

moderately dense in crescent at adaxial edge of areole, merging with subapical tuft when present, yellow to red-brown, to 5 mm.

inner tepals yellow with red basal portions, 25–40 mm;

filaments pale yellow;

anthers yellow;

style white;

stigma lobes cream to yellowish.

inner tepals yellow to dull red throughout, 35–45 mm;

filaments yellow to orange-yellow;

anthers yellow;

style pink to red;

stigma lobes yellow-green to green.

green to yellowish to dull red, stipitate, elongate-obovoid, 25–40 × 15–28 mm, fleshy, glabrous;

areoles 16–28.

dark red-purple throughout, obovoid, 35–50 × 30–35 mm, juicy, glabrous, spineless;

areoles 22–36.

tan, subcircular, 4–5 mm, thickish, warped;

girdle broad, protruding to 0.5 mm.

gray, subcircular, warped, 3–4.5 mm diam.;

girdle protruding 0.5 mm.

= 44.

= 66.