Asia dragon eye fresh fruit health texture background culture diet healthy red sweet appearance black seeds cactus fruit climbing cactus colorful colors colourful colours contrast cultivated decorative dragon fruit exotic food green hylocereus undatus ornamental plant pitahaya pitaya red skin shape shapes Sizes smell strawberry pear tasty textures white flesh black-seeds cactus-fruit climbing-cactus dragon-fruit hylocereus-undatus ornamental-plant red-skin seeds seedy size strawberry-pear surface surfaces textured white-flesh Australia black-seed brittle cluster-growth dimocarpus-longan dragon-eye-fruit edible flavor flavour flesh husk juicy leathery-skin light-brown-shell longan lungan produce sapindaceae shell short-fresh-life soapberry-family soft South-East-Asia tactile translucent-flesh tree-fruit tropical cactus moist pips red-flesh succulent-plant unusual