Mature C. bigelovii have growth only on the upper/outer joints with older parts turning black and dying. In experiments, these plants have survived several years after being physically cut-off from the ground and their water source. Photo taken in the Cholla Cactus Garden in Joshua Tree National Park in California.

Mature C. bigelovii have growth only on the upper/outer joints with older parts turning black and dying. In experiments, these plants have survived several years after being physically cut-off from the ground and their water source.
Photo taken in the Cholla Cactus Garden in Joshua Tree National Park in California.

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