Lutea, sometimes referred to as Delavayi, is a species of tree peony from Tibet that has a bright canary-yellow flower. The flower is pendulous and so some of the cultivars and hybrids that derive from this species have flowers that have tendency to face downward. The main attraction of this group is their unique flower coloring. They bring wonderful yellow, gold, and orange, sunset peonies to the garden. These plants are later to bloom than other tree peonies, tend to be lower growing, and have leaf coverage that is more spreading. These plants are not as cold hardy as the other two tree peony groups. In cold winters or in cold zones, Lutea tree peonies will die back to the ground in winter, but will reemerge beautifully from the root in spring.
Of special note is that lutea hybrids are the main tree peony group that has been used to create the intersectional peony hybrids - intersectional peonies have inherited the wonderful colors of the lutea hybrids.