Slate. Slate is a metamorphic rock. Metamorphic rocks are formed when sedimentary or igneous rocks are exposed to conditions of very high pressure or temperature, or are exposed to large amounts of very hot water. Slate is formed when fine-grained sedimentary rock (shale) is buried and exposed to high pressure deep beneath the Earth's surface.
The peony is a flowering plant in the genus Paeonia, the only genus in the family Paeoniaceae. They are native to Asia, Southern Europe and Western North America.Boundaries between species are not clear and estimates of the number of species range from 25 to 40.erbaceous and Itoh peonies are propagated by root division, and sometimes by seed. Tree peonies can be propagated by grafting, division, seed, and from cuttings, although root grafting is most common commercially. Herbaceous peonies such as Paeonia lactiflora, will die back to ground level each autumn.
This does not refer to the color of the flowers, which are pink, red, purple, or white, but to the color of the processed root. Peony is used for gout, osteoarthritis, fever, respiratory tract illnesses, and cough.