Echinocactus grusonii

Echinocactus grusonii or Kroenleinia grusonii, popularly known as the golden barrel cactus, golden ball or mother-in-law’s cushion, is a species of barrel cactus which is endemic to east-central Mexico.
It is rare and endangered in the wild.     The cactus grows in volcanic rock on slopes, at altitudes around 1,400 metres (4,600 ft).
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