Dirigible plum

The Dirigible plum is an orange radish-like fruit, which according to Xenophilius Lovegood enhances the ability of one to accept the extraordinary. His daughter Luna Lovegood can often be seen wearing earrings shaped like this plant. On his stone bust of Rowena Ravenclaw, Xenophilius, in an attempt to recreate her lost diadem, included this plant as part of the headdress.