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.

commonly absent or evenly distributed with 1–3(–8) per areole, deflexed, yellow or brown, tipped yellow or mottled brown, straight, acicular, the longest to 50 mm.

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

widely and evenly spaced, conspicuous, radiating like star or pincushion, pale to deep red-brown, sometimes tipped yellow, 3–8 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, orange, or deep red (rarely magenta), to 30 mm;

anthers yellow;

filaments and style usually cream to pink;

stigma lobes dark 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.

purplish red, ovoid to pyriform, 30–38 × 17–25 mm, juicy, glabrous, spineless;

areoles 24–26.

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.

subcircular, 3–3.5 mm diam.;

girdle size unknown.

= 44.