The Herbarium of the University of Bologna (BOLO) is one of the oldest in the world and its historical section preserves collections dating back to the XVI Century, testifying the great value of Bologna’s Botanical School. The origin of the study of Botany was strictly connected to the capacity of herbs to cure. The first botanical lectures were held for Medicine students and the identification and the properties of plants were the main subjects of study. During the XVIII and XIX Centuries some pharmaceutical herbaria were realized in Bologna. During the 66th National Congress of History of Pharmacy two of these collections were illustrated giving the opportunity to have a look to the study of Pharmaceutical Botany during the XVIII Century, related to the personal attitude to Botany of the authors of the collections.