Flora of North America species comparison

6–8 per areole (1–2 bristlelike spines) increasing with time, well distributed along stem, slightly interlacing with spines of adjacent areoles, short;

abaxial spines usually reflexed, whitish, pinkish to red-brown, lightly flattened, the longest 10–18 mm;

adaxial spines erect or spreading, rich red-brown, gray coated basally, subterete, 6–11 mm;

sheaths grayish, tipped brown or yellow to golden Glochids in small adaxial tuft or crescent, dark yellow, to 1 mm.

0–2(–3) per areole, sparsely distributed along stem, usually deflexed, pale yellow or red-brown aging black, stout, the longest 0.8–3.5(–5) cm;

sheaths loose fitting, yellowish brown.

in adaxial tuft and marginal, encircling areole, pale yellow.

inner tepals yellow-green, yellow to gold or bronze, or red to rose or magenta, spatulate, apiculate;

filaments yellowish green;

anthers yellow;

style whitish to pale bronze;

stigma lobes whitish.

inner tepals green- or orange-bronze, spatulate, 17–20 mm, apiculate;

filaments dark green-bronze;

anthers yellow;

style whitish basally to light orange apically;

stigma lobes very pale green.

often proliferating, yellowish green or tinged red to purple, often stipitate, obovate, 25–40 × 10–20 mm, leathery-fleshy, tuberculate or smooth, essentially spineless;

tubercles prominent, at first, subequal in length or proximal ones longer, fertile ones swelling and becoming smooth;

umbilicus to 9 mm deep;

areoles 20–30.

green, becoming yellowish apically, sometimes tinged red to purplish at areoles, commonly sterile, then narrow, tuberculate, to 2.5 cm, fertile ones stipitate, obconic, 20–50 × 15–35 mm, fleshy, becoming smooth, spineless;

umbilicus 3–4 mm deep;

areoles 15–17(–34).

yellowish, polygonal in outline, warped, 3.5–5.5 × 2.5–5 mm, sides nearly flattened with depressions and protrusions to angular subspheric;

girdle smooth or in a groove.

pale yellow, angularly circular to oblong, thick, 3–5 mm diam., lumpy;

girdle smooth, broad, not protruding.

= 22.

= 66.