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.

5–12 per areole, at most areoles, spreading, obscuring stems, yellow, acicular, larger ones 3–6 cm;

sheaths persisting, yellow to tan, loosely fitting, 2–4 mm diam.

in small adaxial tuft, pale yellow, 0.5–1.2 mm.

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 yellow to yellow-green, spatulate, 15–20 mm, apiculate;

filaments yellowish;

anthers yellow;

style green to reddish;

stigma lobes yellow-green to 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.

usually sterile, not proliferating, yellow to yellow-green, often tinged red, top-shaped to clavate, 25–50 × 8–15 mm, pulpy, tuberculate, spineless or sometimes weakly spined;

tubercles subequal;

umbilicus 5–7 mm deep;

areoles 32–40.

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.

light tan, ± obovate, to 2.5 × 2 mm;

girdle smooth.

= 22.

= 22.