Paeonia sp. (Paeoniaceae) Peony.

The peony has long been used medicinally in Europe, China and North America. Although the entire plant is poisonous, the roots have been used as an antispasmodic, diuretic and as a sedative. In Europe the peony root was an old remedy for jaundice and for kidney and bladder problems. A decoction of the root has also been used for gout, asthma, cramps, and, in very small doses, eclampsia.

BLACKWELL, ELIZABETH (c1700-1758). A CURIOUS HERBAL.
London: Printed for Samuel Harding, 1737-1739.
(Missouri Botanical Garden)