Family Oleaceae. F. ornus is a small tree native to southern Europe and southwest Asia, found by Sibthorp around Byzantium (Istanbul) and on Mount Parnassus. It is frequently planted as an ornamental in northern Europe, with one specimen planted in this College in the square outside the Zoology Building. The common name comes from the sugary sap, which can be extracted by cutting the bark - the sap being compared, in medieval times, with the biblical manna. The sugar called mannose derives its name from the extract.