Orange is a kind of citrus in Rutaceae, also known as orange, yellow fruit and golden ring. Orange is a citrus fruit, and it is also a mixed variety planted by human beings for a long time-originally a hybrid variety of grapefruit and orange, which originated in Southeast Asia; From a biological point of view, the sweet orange people eat every day is actually a variety-the original variety should be lime, and the sweet orange is a variety of lime in southern China.

Oranges are small evergreen trees, 3-8 meters high; Circular crown; Leaves elliptic or ovoid, slightly pointed, wings slightly smaller, serrated; White flowers, blooming in April; Spherical or ovoid fruit with thick skin and smooth surface, which is not easy to peel off; The stele is generally full; The seeds are multi-embryo, and the embryo is white; According to different varieties, fruit maturity is different, generally in winter.

Extended data

Oranges are rutaceae plants.

Pomelo, orange, tangerine, tangerine and kumquat are all important fruit trees, mainly produced in the south of the Yangtze River. Zanthoxylum bungeanum is widely planted in northern China. Phellodendron amurense and Cortex Phellodendri are precious timber tree species, with yellow or yellowish brown wood, hard material and beautiful texture, which are used in fine furniture, shipbuilding, aviation and other industries.

The fruits of some genera can be eaten raw or used as raw materials for cold drinks. Huangpi and kumquat, especially citrus fruits, are fruits in autumn, winter and even early summer of the following year. They are rich in citric acid, sugar, vitamin P, pectin and other nutrients. Grapefruit, citron, lemon, sweet orange, especially the flowers and skins of lime contain high-quality essential oils, which are valuable natural spices for dietary seasoning.

Baidu encyclopedia-orange