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 not disarticulating, gray-green to yellow-green, flattened, circular to broadly obovate, 12–22 × 12.5–20 cm, sometimes wider than long, ± tuberculate, glabrous;

areoles 6–9 per diagonal row across midstem segment, prominent, circular to elliptic, 4–7 × 3–7 mm;

wool tan to brown, aging gray.

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, reddish yellow to red-brown;

abaxial ones sometimes whitish;

adaxial spines often yellow;

major spines (0–)4–8(–9) per areole, usually deflexed, sometimes spreading, particularly on stem segment margins, subterete to flattened or channeled adaxially, sometimes curved, stiff, the longest 40–60 mm.

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

crowded in extended marginal crescent, nearly encircling areole, and less dense subapical tuft obscured by long dense wool, yellow to yellow-brown, 1–6(–12) 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 sometimes with faint basal reddish blush, broadly obovate, 22–35 mm, apiculate;

filaments and anthers yellow;

style white;

stigma lobes greenish white.

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

areoles 22–36.

dull red with greenish flesh, ovate to obovate, 32–50 × 15–30 mm, fleshy, glabrous, spineless;

umbilicus 4–6 mm deep;

areoles 28–46.

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

girdle protruding 0.5 mm.

yellowish, reniform to subcircular, 4–5 mm diam., sides flattened, smooth;

girdle protruding 0.5–0.8 mm.

= 66.

= 22.