Frequently called Eve's Needle Cactus or Eve's Pin Cactus or Cane Cholla.
Name: The latin name comes from the Latin australis (southern) and the Greek cylindro (cylinder) and opuntia (referring to an ancient Greek city, Opus) pronounced oss-troh-sil-in-droh-PUN-tee-uh
Origin: High elevations in Ecuador and Peru, 8000 to 12000 feet (2400 to
3600 m)Growth Habits: Tree-like cactus, up to 13 feet tall (4 m), 10 feet in diameter (3 m); stems up to 20 inches long (50 cm); awl like leaves, up to 5 inches long (12 cm); 1 to 4 spines, up to 3.2 inches long (8 cm); Red flowers, up to 2.4 inches long (6 cm)