Valerian is a perennial plant that is native to Europe and grows up to 2 feet tall. It is grown to decorate gardens but also grows wild in damp grasslands. Straight, hollow stems are topped by umbrella-like heads. Its dark green leaves are pointed at the tip and hairy underneath. Small, sweet-smelling white, light purple or pink flowers bloom in June. The root is light grayish brown and has little odor when fresh.