The "American Beauty" dragon fruit variety's hybrid parentage is not explicitly documented or widely known. It's described as a variety introduced from Guatemala to Florida, then to California, with parentage that is "unknown". While its specific hybrid origins are unclear, it's known to be a variety of S. Guatemalensis. This variety is recognized for its attractive appearance and excellent flavor. 
American Beauty is one of the most sought-after dragon fruit varieties due to its stunning appearance, self-fertility, and great taste. The plant has much skinnier branches than most varieties, with thorns that don’t match up on adjacent ribs. This makes the plant look quite unique, if a little spindly. Despite its skinny branches, American Beauty still produces fruit of a reasonable size on its own pollen