Flora of North America species comparison

segments firmly attached, green, 3–9(–15) × 0.5–1.5(–2.2) cm;

tubercles prominent, short, 0.5–1 cm;

areoles oval to obdeltate, 2–6 × 1.5–4 mm;

wool pale yellow to white, aging gray.

(1–)3–8(–10) spines per areole, in all but basalmost areoles, best developed toward apex, interlacing with spines of adjacent areoles, whitish or pale yellow, pale red-brown, sometimes tipped yellow, of 2 kinds;

radial spines slender, flattened basally, deflexed, 5–8 mm, surrounding central spines;

central spines usually 4(–6), spreading into a cross, stout, subterete, 2–3.4(–4.5) cm;

also 0–2 bristlelike spines;

sheaths whitish to pale yellow (rarely golden) throughout or tipped yellow to golden.

(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.

in adaxial tuft, yellow, 1–3 mm.

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

inner tepals yellow to green-yellow, spatulate, 15–25(–30) mm, apiculate;

filaments yellowish or yellow-green;

anthers yellow;

style white to yellowish;

stigma lobes whitish, yellowish, or pale green (rarely pink tinged).

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.

rarely proliferating, yellow to greenish yellow, broadly cylindric to subspheric, 18–30(–35) × 15–22(–32) mm, fleshy, tuberculate, spineless;

tubercles subequal or distalmost longest, usually prominent;

umbilicus 7–8 mm deep;

areoles 36–62.

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.

pale yellow, subcircular to slightly angular in outline, flattened to warped, 3–3.5 × 2.5–3.5 mm, sides smooth or with 1–3 depressions;

girdle smooth.

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

girdle smooth.

= 22, 44.

= 22.