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Stenocactus pentacanthus (Echinofossulocactus pentacanthus) is a cactus native to Central Mexico. It can grow to 8 cm (3 ¼ inches) in diameter. The plant is greyish-green in colour with 30 to 40 wavy-edge ribs with few areoles. Its flowering period is normally during spring. These flowers can grow to 2 cm (3.4 inches) long. The flowers are whitish with a pale purple mid-stripe. They enjoy full sun and need a minimum temperature of 10 °C (50 °F).
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