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This plant is said to grow outdoors in the following regions:
Phoenix, Arizona
The subspecies 'echinaria' is different in that it has 2-3 dark central spines. Unlike the subspecies 'elongata' which has none or very s...Read Morehort central spines if any. The 'Copper King' cultivar has copper colored spines on top.
The subspecies 'echinaria' is different in that it has 2-3 dark central spines. Unlike the subspecies 'elongata' which has none or very s...Read More