This accession was received at the CCPP in October 2010 as part of a collaborative project with Greece funded by the European Union. Under this project a number of cultivars from the Greek national citrus foundation collection at Poros Arboricultural Station (PAS) were tested at the CCPP for graft-transmissible pathogens of citrus (Wang et al. 2013). Subsequently, the CCPP inquired of PAS if among the tested varieties there were any unique or interesting cultivars suitable for California. PAS highlighted 'Adamopoulou' lemon and 'Mihrio' mandarin. Information from the donor in Greece indicates that 'Mihrio' is a commonly grown mandarin in Greece of unknown parentage. This cultivar has been reported to be very stable since no chimeras or bud sports have been observed in Greece. The trees of 'Mihrio' mandarin are very productive. In Greece, Mihrio flowers around April and the fruit mature around January holding well on the tree as late as March. The fruit are seedy, easy peeling and have a distinct aroma. This cultivar will be evaluated in California once the trees produce fruit. (RR Krueger, 2016-02-06)