Carol- yeah it may well be but the dragonfruit i know has the pink fruit with the white inside and the pitaya has the yellow fruit. My plant is only small and has had one flower (that i know of) and one fruit that was perfect. It was a cutting i got sent in the mail.
the flower was white and reallly big, opened one night/early morning and i missed it but saw it closed. Since it fruited that means it was pollinated doesnt it? what with though?
The black bit on the plant is where i pulled the fruit from.