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.

4–7 per areole, mostly in distal areoles, black to red-brown with conspicuous brown to yellow tips, fading gray;

longer spines ascending, usually straight, acicular, terete, 25–35 mm; 1–2 smaller spines deflexed, chalky white, to 10 mm; 0–4 additional very small spines.

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

in bushy crescent at adaxial edge of areole and dense subapical tuft, yellow to brown, aging blackish, of unequal lengths, to 5 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 yellow throughout, quickly fading to apricot, 25–30 mm;

filaments and anthers yellow;

style whitish;

stigma lobes greenish yellow to yellow.

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

umbilicus 5–12 mm deep;

areoles 24–76.

red-purple, green-yellow interior, spheric-obovoid to pyriform, 15–20 × 12 mm, fleshy, glabrous, spineless;

areoles 20–25.

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 gray, subcircular, 3–4 mm diam;

girdle narrowly protruding.

= 22.