These beautiful "Crested Toothpick Cactus" are very unusual.
Stetsonia is a genus of cactus, with the sole species Stetsonia coryne, the toothpick cactus.
The plant is native to the deserts of Argentina and Bolivia. Stetsonia coryne grows to a
height of 15 to 25 ft (4.6 to 7.6 m) tall. It has white flowers. The genus was named to
honor Francis Lynde Stetson, a New York attorney and plant lover.[1]
https://en.wikipedia.org/wiki/Stetsonia_coryne
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