Stylistics is an area of knowledge in linguistics the purpose of which is the study of various expression methods of a text. From this perspective, a way of expression which is substantially repeated from the beginning to the end of a text is called "style". The present article examines the style of the book "al-Jami fi al-Adwiya al-Mufrada" by Ibn al-Baitar. Ibn al-Baitar is one of the Andalusian botanists and pharmacologists who has had a significant impact on the development of pharmacology through his writing. His book, the great encyclopedia of pharmacology, is believed by many Muslim and non-Muslim scientists to be the most detailed and clear pharmaceutical work in the Islamic civilization. The aim of this study is to shed light on Ibn al-Baitar's practices in writing this book.  To this end, at first the lexical and idiomatic meanings of stylistics are presented, then after a short introduction about Ibn al-Baitar and his works, using a descriptive-analytic approach the article deals with the style-making methods of the text in his book.

The findings of the study indicate that the book enjoys features of the scientific approach in a way that the writer has stuck to a certain approach to the end of the book and this is exactly what should be observed in scientific styles of writing.