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, green, flattened, narrowly to broadly obovate, 6.5–15 × 3–11 cm, low tuberculate, glabrous to papillate;

areoles (4–)7–8 per diagonal row across midstem segment, subcircular, 3–3.5 mm diam.;

wool white.

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.

(0–)1–3(–4) per areole, in distal 20–50(–70)% of areoles, porrect to reflexed, yellow-gray to whitish gray, sometimes brown in basal 1/2, straight, sometimes curved, usually flattened, slender, longest (35–)50–70 mm.

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

conspicuous, in broad, dense crescent at adaxial margin of areole, red-brown, to 4 mm, sides sometimes converging into columns.

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 magenta throughout, 25–35 mm;

filaments yellow to red-orange to magenta;

anthers yellow;

style white;

stigma lobes green.

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

areoles 22–36.

tan, 20–30 × 18–20 mm, maturing dry, glabrous to papillate;

areoles (16–)24–34, distal areoles bearing 1–4 short spines.

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

girdle protruding 0.5 mm.

tan, oval to subcircular, 6.5–8 mm, warped;

girdle protruding 1.5–2 mm.

= 66.

= 88.