Psyllium, Illustration of a plant called Psyllium from the 16th century, Fig. 125, p. 154r, 1561, Valerius Cordus, Konrad Gessner, Benedictus Aretius, Pedanius Dioscorides: In hoc volumine continentur Valerii Cordi Simesusii annotationes in Pedacii D