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(–2) per areole, usually few along margins of stem segments, deflexed to erect, pale yellow to horn colored (aging reddish brown), straight to slightly curved, acicular, terete, the longest to 40 mm, usually shorter.

(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.

dense in crescent at adaxial edge of areole, nearly encircling areoles, and in subapical tuft, of even height, yellow to tan, aging brown, to 5 mm.

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

inner tepals yellow throughout, fading orangish, 25–45 mm;

filaments pale yellow throughout or pale yellow proximally, white distally;

anthers pale yellow;

style white;

stigma lobes light green.

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

filaments pale yellow;

anthers yellow;

style white;

stigma lobes cream to yellowish.

purplish, green inside, obovoid to barrel-shaped, 25–45 × 20–30 mm, fleshy, glabrous, spineless;

areoles 34–44(–54).

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

areoles 16–28.

tan, 3.5–5 × 3–4 mm, sides convex, often bearing bumps;

girdle protruding 0.5 mm.

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

girdle broad, protruding to 0.5 mm.

= 22.

= 44.