Flora of North America species comparison

segments not disarticulating, green, flattened, elliptic to obovate to rhombic, 15–25(–40) × 6.5–14 cm, ± tuberculate, glabrous, usually glaucous;

areoles 5–7(–8) per diagonal row across midstem segment, prominent, subcircular(-oval), 4–6 × 4–5 mm, enlarging in age;

wool gray.

segments not disarticulating, grayish green, flattened, reniform, circular, elliptic, or obovate, (7.5–)10–18(–25) × 5–25 cm, low tuberculate, pubescent;

areoles 8–13 per diagonal row across midstem segment, circular, 3–3.2 mm diam.;

wool white to tan, aging gray.

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.

absent.

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

numerous, nearly filling areole, red-brown to white, 1–2.5 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 yellow throughout, aging apricot to orange, obovate-apiculate, 25–38 mm;

filaments whitish;

anthers yellow;

style green;

stigma lobes dark green.

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

areoles 22–36.

red with green flesh, obovate, 20–35 × 15–23 mm, fleshy, short pubescent, spineless;

umbilicus 5–7 mm deep;

areoles (30–)36–52.

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

girdle protruding 0.5 mm.

yellowish, elliptic to subcircular, angular, 3–3.5 × 2.5–2.8 mm, thick, sides smooth or with 1–2 depressions;

girdle protruding about 0.3 mm.

= 66.

= 22.