Austrocylindropuntia subulata is a species of cactus native to the Peruvian Andes. The name comes from the Latin subulate, for awl-like, referring to the shape of the rudimentary leaves. It has the common names "Eve's pin" and "Eve's needle."
Opuntia Subulata (Austrocylindropuntia) belongs to the Cactaceae family. It is among 300 or so species that fall into the genus Opuntia which is one of the largest genus’ in the family Cactaceae. The Opuntia genus is further divided into subcategories based on the appearance of the stems. Awl cactus belongs to the Austrocylindropuntia group. Unlike other cacti such as Beaver Tail or Prickly Pear Opuntia with large flattened stems or pads, this plant is characterized by cylindrical, branching trunks with small thorns and awl-shaped leaves.