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.

1–3(–4) per areole, ± evenly distributed on stem segment, porrect to spreading, gray to whitish or cream, tipped black, straight, acicular, to 40 mm, barbed.

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

yellow, aging brown, 4–9 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, 20–25 mm;

filaments pale green to yellow;

anthers yellow;

style pale green or white, pink tinged;

stigma lobes color unknown.

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, ovoid to obovoid, 25–30 × 15–20 mm, fleshy, glabrous, bearing few areoles, spineless.

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, subcircular, somewhat flattened, 2.5 mm diam.;

girdle protruding less than 1 mm.

= 22.