Determination of one century of East Africa's plants, collected by several students (Milchersich R., Romagnoli M., Cappelletti F., Nastasi V., Candusio R., Chiuderi A. Saccardo D., Capuano D., Jannone G. e Previeri O.) in Eritrea, Abyssinia and Italian Somalia during the yars from 1937 to 1951 and preserved in Erbario Coloniale at Florence.