Flora of North America species comparison

segments green, broadly oblong to ovate to narrowly elliptic, (20–)4–60 × 2–3+ cm, low tuberculate;

areoles 7–11 per diagonal row across midstem segment, rhombic to subcircular, 2–4(–5) mm diam.;

wool brown.

segments not disarticulating, blue-green, flattened, obovate to circular, 13–21 × 11.5–19 cm, nearly smooth, glabrous;

areoles 7–10 per diagonal row across midstem segment, subcircular to elliptic, with basal ridge, 3–6 × 2.5–4 mm;

wool tan, aging grayish white.

1–6 per areole, absent or very highly reduced, or in marginal to nearly all areoles, erect to spreading, whitish, tan, or brown, setaceous only or setaceous and subulate, straight to slightly curved, basally angular-flattened, 1–10(–40) mm; 0–2 small bristlelike deflexed spines to 5 mm.

absent or usually in distal areoles to evenly distributed over entire stem segment, yellow, aging red-brown to blackish, straight or weakly curved, ± acicular, deflexed, or some erect in marginal areoles;

larger spines 0–7 per areole, terete or basally flattened, 25–45 mm, usually accompanied by few straight to wavy bristle-spines.

along adaxial margin of areole and small, inconspicuous tuft, yellowish, aging brown, less than 2 mm.

crowded in narrow crescent along adaxial margins, longer toward base of areole margins, subapical tuft absent or poorly developed, yellow, aging reddish brown, to 14 mm.

inner tepals yellow to orange throughout, 25–50 mm;

filaments and anthers yellow;

style bright red;

stigma lobes yellow.

inner tepals yellow (sometimes with reddish blush near base), abaxially reddish streaked along midveins, broadly spatulate-apiculate, 18–30 mm;

filaments white to yellow;

anthers;

style and stigma lobes white, yellowish, or pale green.

yellow to orange to purple, 50–100 × 40–90 mm, fleshy to ± juicy, glabrous, usually spineless;

areoles 45–60, evenly distributed on fruit.

red, barrel-shaped, 30–60 × 18–40 mm, fleshy (often mummifying), glabrous, spineless;

umbilicus 6–9 mm deep;

areoles 40–68.

pale tan, subcircular, 4–5 mm diam., warped;

girdle protruding to 1 mm.

yellowish, 3.5–4 × 3–3.5 mm, 1.5–1.8 mm thick, reniform to subcircular, flattened, often warped;

girdle protruding 0.1–0.5 mm.

= 88.

= 22.