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 easily detached to firmly attached, green, flattened, narrowly to broadly obovate, 3.5–9 × 2.5–5 cm, low tuberculate, glabrous;

areoles 4–6(–7) per diagonal row across midstem segment, oval, 3.5 × 2.5 mm;

wool white.

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.

in most areoles, straight, acicular, terete;

major spines 0–1 per areole, reflexed to porrect (rarely ascending), gray-white to brown, (15–)25–40(–60) mm; intermediate spines 0–3, reflexed, 12–20 mm;

minor spines 2–4, reflexed, yellow-gray, 3–6 mm.

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

loosely packed, in small tuft or crescent at adaxial margin of areole, yellowish, inconspicuous, to 4 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, 30–45 mm;

filaments white to red;

anthers yellow;

style white;

stigma lobes green.

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

areoles 22–36.

rarely set, top-shaped to barrel-shaped, 15–20 × 15 mm, glabrous;

areoles 10–15, most bearing 3–12 spines or distal spines bearing 1–3 spines.

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

girdle protruding 0.5 mm.

tan, large, 5–7 mm;

girdle protruding 1–1.5 mm.

= 66.

= 66.