Potion or poison? Rosemary

Rosemary is an evergreen bush perennial that grows to a height of two to six feet with pale blue flowers and spiky leathery leaves. It is a member of the mint family, Lamiaceae, along with many other herbs such as oregano, thyme, basil, and lavender. The name rosemary derives from the Latin ros marinus, which means dew of the sea. Although native to the Mediterranean landscape where it can be found growing on rocky limestone sea cliffs, it is now cultivated throughout the world as an ornamental and aromatic plant. The distillation of the flowering tops of the plant in the 13th century furnished a distillate that was known in the fragrance industry as Queen of Hungary Water. The epithet officinalis in the plants botanical name originates from its well recognised medicinal properties by herbalists in ancient times