This volume is the first edition of Petrus de Alvernia's "Sententia super librum 'De vegetabilibus et plantis'. The treatise 'De vegetabilibus et plantis', which goes back to the Peripatetic Nicolaus of Damascus and has an interesting tradition (from Greek into Syrian, from Syrian into Arabic, from Arabic into Latin), was considered to be a work of Aristotle's and was among the subjects prescribed for study in the Facultas Artium in Paris. Petrus de Alvernia's Sententia should primarily be regarded as an exposition of this often problematic work for the students of this faculty.
The Introduction discusses the tradition of 'De vegetabilibus et plantis', the authenticity of the ascription of the commentary to Petrus de Alvernia, the characteristiscs of the commentary, and its relation to the commentary by Albertus Magnus.The Text is followed by indices nominum, locorum, plantarum, and verborum potiorum.

E.L.J. Poortman, doctorate in Ancient Philosophy (1978), University of Amsterdam, is reader in Ancient Philosophy at the University of Amsterdam. He has published, together with H.J. Drossaart Lulofs, Nicolaus Damascenus, De Plantis: Five Translations (North-Holland Publishing Comp., 1989).