Blooming tea or flowering tea is one of the most beautiful ways to have tea. Blooming tea is made to emulate a flower blooming and consists of a tea ball made of dried green tea that "blooms" as it absorbs water. Normally they are hand tied bundles and quite time consuming to make. I have included here a link to a video by teaposy who sell blooming tea to give you some idea of the different effects achieved by different flowers.
According to the Wiki flowers commonly used in flowering teas include globe amaranth, chrysanthemum, jasmine, lily, hibiscus, and osmanthus. My favorite are the jasmine ones as there is a delicate floral flavor and scent to the tea. Jasmine tea is also particularly renowned for it's relaxing qualities. I received a gift-set of blooming tea a couple of years ago from Teavana which is one of the nicest teashops around for gorgeous tea related gifts.