Edible and good are very different things. LOL. Yes it is edible.

Yes, pomegranates are so ornamental–both the flowers and fruit–that even if you don't like eating them this is still a plant people might want consider for their yard. It grows well in warm dry climates. vm3y, pomegranates grow almost more like a shrub than a tree, especially some of the varieties, and they can be cut back and managed like a bush too. They'll only get unwieldy if you let them. Another one I can think of are certain types of crabapples, flowering peach. Some ornamentals, such as flowering quince and Japanese plum blossoms produce fruit that is clearly inferior to the varieties that were bred for eating, so to some extent there can be a trade-off between attractiveness of the blossoms and tastiness of the fruit. Medlar has just average attractive blossoms, and just average tasting fruit, it could be seen as a sort of compromise. Mulberries make for very attractive trees, they produce beautiful foliage. A little fact some people do not know, the leaves from the Mulberry tree can be eaten too, or fed to livestock. For those that live in the much warmer parts of the country, why not plant a banana instead of a regular palm? You can use the banana leaves to cook with too. Bananas can be grown in most of Southern California, parts of Texas, the Gulf coast, and Florida. Basjoo, Sikkimensis, and Blue Java tend to be hardier than the others. For those in South Carolina, because of the shorter warm season, Viente Cohol may be a better variety if you want to be able to get any fruit (but it may need some winter protection).

All purple-leaf plum fruits are edible. Are they all as good as orchard plums? No.

Edible most likely Orinoco. Very common along the Gulf Coast. The fruit is angular in your picture which is a characteristic of Orinoco