The petal shape also accounts for a butterfly orchid's beauty and no doubt the pointed sepals on Doritaenopsis Alisun Rainbow "Alisun" makes this a special flower indeed. All orchids have three sepals which was once the bud of the flower. When the sepals open, exposing the two petals, what was once the outer portion of the orchid bud because an orchid's sepals. Some sepals are round at the ends but Doritaenopsis Alisun Rainbow "Alisun" has pointed sepals and that's special not to mention the color takes beauty out of the park.