Any of several evergreen shrubs or small trees of the genus Fortunella (rue, or citrus, family), or their fruit. Native to eastern Asia, kumquats are cultivated throughout the subtropics. The mainly thornless branches bear dark green, glossy leaves and white, orangelike flowers. The small, bright orange-yellow, round or oval fruit has mildly acid, juicy pulp and a sweet, edible, pulpy skin. Kumquats may be eaten fresh, preserved, or candied, or made into jams and jellies. In the U.S., hybrids have been produced with other citrus fruits.