Ruta graveolens commonly known as rue, common rue or herb-of-grace, is a species of Ruta grown as an ornamental plant and herb. It is native to the Balkan Peninsula. It is now grown throughout the world in gardens, especially for its bluish leaves, and sometimes for its tolerance of hot and dry soil conditions. It is also cultivated as a medicinal herb, as a condiment, and to a lesser extent as an insect repellent. 

Rue is used as a traditional flavoring in Greece and other Mediterranean countries.

Seeds can be used for porridge.

The bitter leaf can be added to eggs, cheese, fish, or mixed with damson plums and wine to produce a meat sauce.