Scientific Note: First Record of Extrafloral Nectary Expression and Myrmecophytism in the Eastern Prickly Pear (Opuntia cespitosa)

This is the first documentation of extrafloral nectaries and associated myrmecophytism in Opuntia cespitosa. Three species of ants were observed visiting extrafloral nectaries on O. cespitosa, and two species were observed exhibiting competitive plant-guarding behavior.