Physical Graffiti Dragon Fruit is a hybrid variety that comes from Selenicereus Guatemalensis and Selenicereus Undatus. This variety produces a pinkish red-skinned fruit with light purple sweet flesh. These fruits are medium to large averaging .75 to 1.5 pounds. This variety is certainly worthy of attention by home growers for its exceptional taste. If you’re looking for great tasting fruit you must consider this variety. On the downside, this variety is self-sterile but will set fruit with most red-fleshed fruit pollen. The flowers are huge nocturnal blooms that are over 14 inches across and blooms all summer long. It is tops on the list when it comes to flower production. This variety has typical Selenicereus Undatus three-sided growth that grows very aggressive. Additional internet research has stated that 1-S and Physical Graffiti are the same. The 1-S is seedling created by Paul Thomson and mentioned in his book Pitahaya. The 1-S is a cross between Rixford, a purple-fleshed Guatemalan variety, and Niezel, a white-fleshed undatus variety.