Although the early spring flowers are beautiful and the fruit is attractive, the Pyrus communis is normally grown only for its fruit crop and not as an ornamental.
Hylocereus undatus, the white-fleshed pitahaya, is a species of Cactaceae and is the most cultivated species in the genus. It is used both as an ornamental vine and as a fruit crop - the pitahaya or dragon fruit. The native origin of the species has never been resolved.