Flora of North America species comparison

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.

12–25(–30) per areole, gold to pale brown, aging dark brown, longest to 3 cm;

sheaths translucent yellow to pale brown.

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

in adaxial tuft and scattered along margin, yellow to pale brown, of irregular lengths.

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 yellow-green suffused with bronze, pale red, or purple-brown, 20–35 mm;

filaments dark bronze-red to magenta;

anthers yellow, sometimes sterile;

style rose-pink (at least distally);

stigma lobes cream.

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.

grayish tan, 25–30 × 15–30 mm, dry, tuberculate, densely spiny;

tubercles prominent, subequal or basal ones longest;

areoles 24–32.

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

girdle smooth.

rare, tan, circular, flattened, 5–6 mm diam., with 1–2 shallow depressions;

girdle smooth.

= 22, 44.

= 66.