The Meiwa kumquat (Fortunella crassifolia) belongs to Rutaceae (the Citrus family). It is a small evergreen tree that is native to China. It was introduced into Japan at the last years at the Edo period (1826) from Ningbo, Zhejiang in China. This tree grows up 3-6 m in height. As with "Naga kumquat" (Oval kumquat), Meiwa kumquat trees are semi-dormant in winter, allowing them to withstand temperatures below freezing. The flowering season is in summer, and the fruits mature in late winter. The almost-round fruits are orange at maturity, up to 4 cm in diameter. The sweet rind is thicker than the rind of Naga kumquat, making it seem sweeter than Naga kumquat. The flesh is light orange, contains a few seeds, and is acidic. The fruit can be eaten fresh, including the rind which is often the sweetest part. Slice them to add to lettuce or fruit salads, for flavoring beverages, or use to make jams and jellies.