Flora of North America species comparison

(4–)6–18(–24) per areole, at most areoles, interlacing with spines of adjacent areoles, pale tan (rarely yellowish), pinkish to red-brown;

abaxial spines erect to usually deflexed, terete, often flattened basally, 8–19 mm;

adaxial spines erect or spreading, subterete; ± bristlelike spines at areole abaxial margins;

sheaths persisting, uniformly whitish, not baggy.

(0–)1–2(–4) per areole, at most areoles, straight to slightly arched, commonly deflexed, not obscuring stem, yellow to gray, tipped yellow, acicular, the longest 1–3 cm.

in inconspicuous adaxial tuft, yellow to tan, aging gray, 1–2 mm.

in adaxial tuft, yellow, 0.5–2.5 mm.

inner tepals rose to red-purple, bronze-purple, or yellow, sometimes pale greenish yellow or whitish, spatulate, 18–35 mm, emarginate-apiculate;

filaments deep purple to pink-purple, sometimes green;

anthers pale yellow;

style white or pink to purple distally;

stigma lobes white to cream.

inner tepals greenish basally to reddish bronze, tinged magenta apically, spatulate-apiculate, 15–25 mm;

filaments greenish basally to bronze distally;

anthers yellow;

style greenish bronze;

stigma lobes cream.

rarely proliferating, yellow, sometimes tinged reddish to purplish, broadly cylindric, 20–50 × 17–30 mm, fleshy, strongly tuberculate, spineless;

areoles 28–50(–62);

tubercles longer in distal portion of fruit;

umbilicus to 10 mm deep.

green becoming red, obovoid to cylindric, 13–34 × 10–20 mm, fleshy, low tuberculate to smooth, spineless;

tubercles subequal;

umbilicus 3–6 mm deep;

areoles 16–28.

pale yellow, suborbicular to oval in outline, flattened to warped, 4–5 × 3–4 mm, sides with 0–3 large depressions;

girdle smooth.

tan, squarish to oval, 4–5 × 3.5–4 mm, warped, sides smooth to lumpy;

girdle broad, low-ridged.

= 22.

= 44.