Flora of North America species comparison

diffuse.

tuberlike, 7–8 × 2.5–3 cm.

segments clavate, 5–9 × 2–3 cm;

tubercles prominent, 15–25 mm, narrow, 4–6 times longer than wide, obscured by interlacing spines;

areoles 5 mm in diam.;

wool grayish white.

segments short cylindric to clavate, 3.5–9 × 1.5–3 cm;

tubercles 8–18(–22) mm;

areoles circular 3–4 mm in diam.;

wool yellowish white.

14–17(–22) per areole, mostly in distal areoles or ± uniformly distributed, white to brownish, tipped yellow;

major 5–6 abaxial spines strongly deflexed, flattened, longest white margined, 25–45(–58) mm;

central spine brown or white, long tapered;

major ca. 5 adaxial spines divergent, blackish or brown to tan, subterete, angular-flattened at base, longest to 42 mm.

(1–)5–15 per areole, mostly in distal areoles, 3–5 cm;

major 1–3 abaxial spines deflexed, usually chalky white (at least adaxially), flattened to angular-flattened, longest central abaxial spine commonly twisted or curved (at times the only spine in depauperate specimens, those mostly from Big Bend region of Texas);

major 0–5 adaxial spines divergent, ascending, brown to blackish and sometimes chalky, ± terete.

adaxial in areoles, yellow, 5–8 mm.

adaxial in areole, yellow, to 4 mm.

inner tepals pale yellow with narrow reddish midstripes, 15–22 mm;

filaments pinkish or greenish to pale yellow;

style whitish to pale yellow or dull pinkish;

stigma lobes white, greenish white or pale yellow.

inner tepals bright yellow, 25 mm;

filaments green;

style cream;

stigma lobes pale yellow-green.

yellow, 35–55 × 15–20 mm, fleshy, spineless, densely yellow glochidiate;

areoles 35–52.

yellow, aging gray, cylindric to ellipsoid, 20–25(–50) × 10–15 mm, becoming dry, spineless, glochidiate;

areoles 25–35.

yellowish white, 4–4.5 × 3.5–4.5 mm, smooth.

yellowish to brownish, ± circular, to 5 mm in diam., with various numbers and sizes of bumps.

= 22.

= 22.