What is the relationship between lemon, orange and orange?

Citrus, orange and orange are three different varieties of citrus fruits, which are easily confused because of their similar appearance. Citrus is the general name of orange, tangerine, tangerine, kumquat, pomelo and bitter orange. The names of orange and orange have long been confused. From a scientific point of view, oranges are the basic species with small flowers, easy peeling and dark green embryos. Citrus is a hybrid of orange and other oranges, such as sweet orange. The flower is big, the fruit is not peeled like an orange, and the embryo of the seed is light green. Therefore, among the wide-peel oranges, tangerine (Lu orange) is orange, and satsuma orange is orange, not orange. Citrus and orange belong to the same family but different species in plant taxonomy. In addition, oranges and oranges are often collectively referred to as "citrus". Citrus is the most important group of citrus fruit trees, with a total of 17 species, which are divided into 6 populations: Dawing Orange, Yichang Orange, Citron Lemon, Pomelo, Orange and Wide Peel Orange. Citrus fruits include oranges, tangerines, grapefruit, citron, sweet orange, lime, kumquat and lemon. In order to facilitate the distinction, the characteristics of oranges, oranges, oranges and grapefruit are as follows:

1, Citrus: It is the mature fruit of many citrus such as Rutaceae. The fruit is large, nearly spherical, with yellow skin, orange yellow or orange red, thick skin, thick sponge layer, loose texture, slightly difficult to peel, and oval seeds. Moderate sweet and sour, resistant to storage.

2. Oranges: Oranges are mature fruits of many kinds of oranges, such as Fuju or Juju of Rutaceae. There are many kinds, including Babu Orange, Money Orange, Sweet Orange, Lime, Miyagawa Orange, Xinjin Orange, Zhangwei Orange, Wenzhou Orange, Sichuan Orange and so on. The fruit is small, usually oblate, and the peel is orange red, vermilion or orange yellow. The pericarp is thin and loose, the sponge layer is thin, tough and easy to peel, and there are 7 to 1 1 cysts. It tastes sweet or sour, and the seeds are thin and not resistant to storage.

3. Oranges refer to a group of plants under Rutaceae, Citrinae, Citrinae and Citrinae. Varieties are golden orange, navel orange and so on. Common mainly refers to sweet orange. Zhongyu No.7 sweet orange is a new seedless, high-quality, high-yield, storable, fresh and processed (juice-making) sweet orange variety bred by Citrus Institute of Chinese Academy of Agricultural Sciences. The fruit is round or rectangular, the peel is smooth and thin, and the capsule is compact, so it is not easy to peel. The meat is moderately sweet and sour, and the aroma is overflowing.