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(–4) per areole, in distal 3/4 of stem segment areoles (to nearly spineless), porrect to spreading, red-brown, aging gray, stout, straight, terete, to 30 mm, strongly barbed.

(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.

in crescent at adaxial edge of areole, pale yellow, aging brown, to 3 mm, longest at areole apex.

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

inner tepals yellow throughout, 20–30 mm;

filaments and anthers yellow;

style and stigma lobes white.

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

filaments pale yellow;

anthers yellow;

style white;

stigma lobes cream to yellowish.

green becoming red-purple at late maturity, barrel-shaped, 18–30 × 12–20 mm, fleshy, glabrous, spineless;

areoles 8–16.

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

areoles 16–28.

tan, subcircular, flattened, 4–6 mm diam.;

girdle slightly protruding.

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

girdle broad, protruding to 0.5 mm.

= 44.

= 44.