paper peony, a black peppercorn, or a black rose, is an American peony species native to northern California.
The peonies are a species of the genus Quercus, a name meaning “flower of the peonies.”
According to the National Zoo, there are more than 1,000 varieties of peonies in the world, and about 50 varieties are used as pet food.
According to a Wikipedia article, peonies have a long history of use in China, where they are used to make a tea, and in India, where the peony is also used to dye fabrics.