Flora of North America species comparison

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.

5–8(–10) per areole, best developed in distal areoles, usually reflexed, spreading or some erect in marginal areoles, red-brown (often with darker annular rings) with yellow tips, aging blackish, straight or weakly curved, not or slightly flattened near bases;

central spines 1(–2), much longer and stouter, ± acicular, 10–40 mm.

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

crowded in crescent at adaxial edge of areole and subapical tuft, radiating and well developed in old stem segments, yellow, to 3 mm.

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.

inner tepals cream to lemon yellow, orangish abaxially on midvein areas, broadly spatulate-apiculate, 20–30 mm;

filaments cream-yellow;

anthers pale yellow;

style pale cream;

stigma lobes pale greenish yellow.

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

areoles 22–36.

red, subspheric, 15–28 × 12–23 mm, fleshy, glabrous, spineless;

umbilicus 4–5 mm deep;

areoles 24–36.

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

girdle protruding 0.5 mm.

tan, subcircular to reniform, flattened, warped, 3–4 × 2.7–3.5 mm, 2 mm thick;

girdle protruding 0.5–0.8 mm.

= 66.

= 22, 44.