The tree aeonium is a plant that comes from the Atlantic region of Morocco was known by both the classical world as medieval Islam. Proof of this is what is illustrated in different Arabic versions of Materia Medica of Dioscorides, a Greek physician who lived in the first century AD whose work, in five volumes, is about the 'preparation, properties and testing of drugs'. This text is of great importance for the development of modern pharmacology, and describes about 600 medicinal plants, including the tree aeonium, about 90 minerals and about 30 substances of animal origin. Unlike other classics, it had a great impact in the Middle Ages both in its original in Greek and other languages, such as Latin and Arabic. Its first successful translation was done in the neighboring city of Cordoba, by the Greek monk Nicholas and the Jewish Hasdai ibn Shaprt during the caliphate of Abderraman III. A government that marked the beginning of a truly green revolution in the south of the Iberian Peninsula and that was based in part on knowledge of the properties of plants, both in the medical and botanical areas.