These are the Triumphs, the ones that make up the largest group of Dutch tulips, and the mainstay of the cut flower trade. Their flower shape is the classic tulip form, and their rainbow colors are known for purity. Some even have a striking "shimmer" or sheen to the petals, especially in sunlight. They aren't as perennial in the garden as the Darwin Hybrids, but many people think the Triumphs have a classic beauty no other tulips can match. (And the fact that they're inexpensive doesn't hurt.)