It is also found naturally in numerous plants, including bitter orange. People of Nabeul also distill flowers of bitter orange, Bourbon geranium and Damask rose. Among the known ingredients were cassia, cardamom, and bitter orange peel. The Belgian "Witbier" (white beer) is often spiced with the peel of the bitter orange. September 2007, they released the single , meaning "bitter orange". It is probably a hybrid of "Citrus limetta" (sweet lime) and "Citrus aurantium" (bitter orange). Some plants, like the bitter orange, are sources of several types of essential oil. The herb mixture traditionally includes coriander and bitter orange peel, among other herbs. Case reports have linked bitter orange supplements to strokes, angina, and ischemic colitis. While the raw pulp is not edible, bitter orange is widely used in cooking.