On Plants (Greek: ΠΕΡΙ ΦΥΤΩΝ; Latin: De Plantis) may have been written by Nicolaus of Damascus (ΝΙΚΟΛΑΟΣ ΔΑΜΑΣΚΗΝΟΣ) instead of Aristotle. Sexual reproduction, parasitism, earthquakes and buoyancy are discussed and a correlation is drawn between the shape of thorns and the shape of fire. Translated by Edward Forster. Painting: La Source by Jean-Auguste-Dominique Ingres, 1856. Recording and cover design by Geoffrey Edwards are in the public domain.