Flora of North America species comparison

segments not disarticulating, blue- to yellow-green, sometimes tinged maroon-purple, flattened, spatulate to broadly obovate or subcircular, thick, 5–22(–35) × 2–13.5(–16) cm, nearly smooth, papillose to puberulent (rarely glabrous);

areoles 4–16(–19) per diagonal row across midstem segment, circular to elliptic, 3–5 × 3 mm;

wool white to tan, aging gray.

0(–8) per areole, when present, usually in distal areoles, spreading, yellow, straight, acicular, 5–25 mm.

(0–)1–6(–12) per areole, white to yellow, usually red to dark brown at extreme bases, aging gray to ± black, subulate, straight to curved, flattened to angular at least near base, the longest spreading to strongly reflexed, 10–30(–50) mm.

numerous, nearly filling areoles, yellow to red-brown or dark brown, to 3 mm.

widely spaced, sparse in crescent at adaxial edge, encircling areole or nearly so, and scattered in subapical tuft, yellow to red-brown, aging gray to blackish, of irregular lengths, to 10 mm.

inner tepals pink to magenta throughout (rarely white), 25–40 mm;

filaments red-magenta (rarely pale);

anthers yellowish;

style white to pink;

stigma lobes white to cream.

inner tepals uniformly yellow to buff, sometimes orange to pink to red (rarely whitish), 30–40 mm;

filaments, anthers, and style whitish to cream;

stigma lobes yellow-green to green.

maturing tan, 20–40 × 15–23 mm, dry at maturity, puberulent, spineless (except in var. treleasei);

umbilicus 5–12 mm deep;

areoles 24–76.

dark red to purple throughout, sometimes stipitate, ovate-elongate to barrel-shaped, 35–90 × 20–40 mm, juicy (bleeding and staining), glabrous, spineless;

areoles 20–32 usually toward apex.

yellowish to tan, ± subspheric but angular, thick, 6.5–9 × 6.5–7 mm, sides smooth or bearing 1–3 depressions;

girdle protruding to 1 mm.

tan to grayish, subcircular to deltoid, flattened, 2.5–6 × 2–5 mm;

girdle protruding 0.3–0.5 mm.