The Bunny Ears Cactus (Opuntia microdasys) is a distinctive prickly pear cactus with bunny ear-shaped pads covered in white or yellow glochids. It's native to Mexico and desert regions of Arizona. Appearance: This perennial succulent can grow to 2–3 ft tall and spread 4–5 ft. It has multiple branches and pale green, velvety stem segments that grow in pairs, resembling bunny ears. The pads are covered in sharp spikes.