Plants branched, forming clumps often with more than 100 stems. Roots fibrous. Stems cylindrical, green, to 8 cm (3.1 in) high and 3 cm (1.2 in) in diameter. Ribs 9-10, low. Central spines 3-4, round, straight, projecting or spreading, cream to yellow, becoming gray, 1-2.5 cm (0.4-1 in) long. Radial spines 12-15, needle-like, straight, spreading or flattened against the stem surface, cream to yellow, becoming gray, 0.5-1.5 cm (0.2-0.6 in) long. Flowers short tubular, reddish with pale throats, 5-7 cm (2-2.8 in) long, 3.5-5 cm (1.4-2 in) in diameter. Fruits oval, greenish brown, dehiscing at maturity, 8-12 mm (0.3-0.5 in) long, 9-11 mm (0.4 in) in diameter. Distribution: El Novillo, Sonora, Mexico.
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