Pistacia species are normally dioecious. Three exceptions are reported here: (1) an apparent somatic mutation giving rise to a staminate bearing branch on an otherwise pistillate tree of P. atlantica, (2) a hybrid (P. Vera × P. atlantica) bearing approximately equal numbers of pistillate and staminate inflorescences, usually on separate branches, and (3) a similar hybrid, predominately staminate, but with several branches bearing pistillate inflorescences.