Flora of North America species comparison

segments not disarticulating, green, flattened, elliptic to obovate to rhombic, 15–25(–40) × 6.5–14 cm, ± tuberculate, glabrous, usually glaucous;

areoles 5–7(–8) per diagonal row across midstem segment, prominent, subcircular(-oval), 4–6 × 4–5 mm, enlarging in age;

wool gray.

segments dark green, flattened, elliptic, (4–)10–17.5 × (3–)5–7 cm, moderately tuberculate, making margins appear scalloped, glabrous;

areoles 3–5 per diagonal row across midstem segment, elliptic to subcircular, 4–6 × 2.5–3 mm;

wool pale tan to white, loose.

4–11 per areole, in most areoles, yellow with chalky white coat, to yellow with red-brown basal portions, aging reddish gray;

erect ones terete, stout, straight;

abaxial ones reflexed, shorter, to 12 mm;

adaxial spines spreading, longest spines 20–40 mm.

2–3(–5) per areole, spreading, yellowish, aging gray-white;

major ones straight, stout, slightly flattened, commonly spirally twisted, longest to 25–60 mm.

moderately dense in crescent at adaxial edge of areole, merging with subapical tuft when present, yellow to red-brown, to 5 mm.

dense in crescent at adaxial edge of areole, sparser along sides of areole, yellow, turning red to brown, to 5 mm.

inner tepals yellow to dull red throughout, 35–45 mm;

filaments yellow to orange-yellow;

anthers yellow;

style pink to red;

stigma lobes yellow-green to green.

inner tepals yellow throughout, to 30 mm;

filaments and anthers pale yellow;

style pale greenish yellow;

stigma lobes pale cream.

dark red-purple throughout, obovoid, 35–50 × 30–35 mm, juicy, glabrous, spineless;

areoles 22–36.

reddish at maturity, obovoid, 40 × 25 mm, fleshy, glabrous;

areoles 17–21, bearing few spines to 9 mm.

gray, subcircular, warped, 3–4.5 mm diam.;

girdle protruding 0.5 mm.

tan, subcircular, ± 3 mm diam.;

girdle to 0.3 mm.

= 66.

= 22 (Puerto Rico).