Similarly, Cervi (1997) neither included P. edulis var. kerii within the species P. edulis, nor recognized the distinction of infraspecific categories within P. edulis, stating that the color of the stem, size and shape of the fruit could vary, depending on the place the plant was located, and that the polymorphism in the species could be caused by its extensive cultivation. The variability observed in P. edulis includes the occurrence of specimens with entire, bilobed or trilobed leaves, and bracts ranging from deeply to superficially serrate, on the same plant (Cervi, 1997).