Plumeria plants (Plumeria sp), which are also known as Lei flowers and Frangipani, are actually small trees that are native to tropical regions. The flowers of these beautiful plants are used in making traditional Hawaiian leis. They are highly fragrant and bloom freely from spring throughout fall in multiple colors like white, yellow, pink, and red. These flowers stand out nicely amid the large-leaved foliage, which may be evergreen or deciduous, depending on the type.