Flora of North America species comparison

segments not easily detached, dark green, cuneate-obovate to commonly rhombic, 5–20 × 4–8 cm, fleshy but firm;

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

wool tan.

(0–)1–6 per areole, usually in distal 40% of stem segment, gray-white to red-brown, erect or reflexed, terete or proximal ones flattened, sometimes spirally twisted, longest to 60 mm, very slender, 0.2 mm diam.

well developed in adaxial tuft, yellow or tan to brown-red, aging dull brown, to 6 mm.

inner tepals red throughout or with red basal portions, 25–35 mm;

filaments pale yellow;

anthers yellow;

style whitish;

stigma lobes cream to yellow.

green to yellowish to dull red, long stipitate, elongate-obovoid, 25–40 × 15–40 mm, fleshy, base not narrowed, glabrous, spineless or nearly so;

umbilicus deep;

areoles 14–26.

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

girdle protruding to 0.5 mm.

= 44.