Flora of North America species comparison

in brushlike clusters of 10–15 per areole, flexible, whitish to yellowish tan, aging gray;

abaxial ones erect to descending, recurved, angularly flattened to flattened, sometimes twisted, the longest 23–38 mm;

adaxial ones ascending, erect, divergent, terete to angularly flattened basally, the longest 18–32 mm;

sheaths silvery white.

in inconspicuous small adaxial tuft, pale yellow, 0.5–1.5 mm, few much longer and scattered along periphery of areole.

inner tepals pale yellow to greenish yellow, spatulate, 15–20 mm, apiculate;

filaments yellow;

anthers yellow;

style off-white;

stigma lobes yellowish.

green becoming dull yellow, dry, tuberculate, spineless or with 1–2 short spines;

tubercles subequal in length;

umbilicus deep, 7 × 15–18 mm;

areoles 16–24.

tan, slightly angular and warped, 3–4 × 3.2–3.5 mm;

girdle smooth.

= 22.