Cleistocactus strausii, commonly known as the silver torch or wooly torch, is a perennial cactus of the family Cactaceae. Its slender, erect, grey-green columns can reach a height of 3 m, but are only about 6 cm across.
The silver torch cactus (Cleistocactus strausii), also called a wooly torch cactus, is a columnar cactus that reaches up to 10 feet tall. The name silver or wooly torch comes from the wooly white appearance given by the fine needles and bristles that cover the stem. Mature plants have red flowers that bloom at the tops of the stems in spring or summer. It is native to mountainous regions of Department Tarija, Bolivia between 1,500 m and 3,000 m.