Flora of North America species comparison

segments often easily dislodged, if terminal, green or purple, 5–13 × 1.8–3 cm;

tubercles prominent, broadly oval, 0.7–1.2(–1.5) cm;

areoles obdeltate to rhombic, 4.5–6 × 3–5 mm;

wool yellow, aging gray to black.

0–5 per areole, usually in distal areoles or sometimes absent or nearly so, tan to red-brown to deep purple, aging gray;

major abaxial spines 0–1(–2), the longest spine spreading, (1.5–)2.5–6 cm;

adaxial spines usually reflexed, short to ± 1 cm;

sheaths baggy.

0–8(–13) per areole, sometimes with 1–3 bristlelike spines along areole margins at most areoles, usually slightly interlacing with spines of adjacent areoles, yellowish to tan, sometimes with pinkish hue, to red-brown and partially gray coated, aging brown-gray to gray;

major abaxial spines angular-flattened, usually reflexed, the longest to 30 mm;

major adaxial spines subterete, erect-divergent, the longest to 18 mm;

sheaths uniformly whitish or tipped yellow to gold, slightly baggy.

in subcircular to linear adaxial tuft, yellow to tan to brown, to 2 mm.

in inconspicuous adaxial crescent, yellow, to 1 mm.

inner tepals bronze-red ± suffused rose, with mid stripes darker, ovate, 6–13 mm, acute-apiculate to attenuate;

filaments greenish;

anthers yellow;

style whitish or blushed with rose-pink or light green;

stigma lobes whitish.

inner tepals rose to magenta, spatulate, 18–25(–30) mm, emarginate-apiculate;

filaments deep rose;

anthers yellow;

style white, tinged red-purple distally;

stigma lobes white with hint of green.

maturing tan, ellipsoid to stipitate-ellipsoid, 15–30 × 10–15 mm, dry at maturity, tuberculate, developing increasingly burlike, with many bristlelike spines;

areoles (32–)40–66, evenly spaced, woolly.

usually sterile, sometimes forming short chains, yellow-green to yellow, sometimes purplish, 25–45 × 15–22 mm, fleshy, tuberculate, spineless;

tubercles progressively longer toward fruit apex;

umbilicus 4–7 mm deep;

areoles 32–44.

pale yellow to tan-gray, angular to squarish in outline, warped, 4–4.5 × 3.5–4 mm, sides irregularly concave-convex;

girdle smooth.

pale yellow, orbicular to angular or squarish in outline, flattened to warped, 3.5–4 × 3–4 mm, sides with 0–2 large depressions;

hilum sometimes pointed;

girdle smooth.

= 22, 44.

= 22, 33.