It is a small evergreen tree belonging to the genus Citrus of the Rutaceae family. Plant height up to 6 meters, with long spiny long branches. The leaves are ovate-oblong or oval, the flowers are fragrant, white, and the fruit is subspherical, the pericarp is rough, orange-yellow. The fruit is native to China and is now found in citrus-producing regions around the world. The peel is thick and difficult to peel, the fruit juice is rich, the taste is sweet and sour, and contains a high amount of vitamin C and amino acids. It is not only a popular fruit, but also has a variety of medicinal values. In traditional Chinese medicine, lime is regarded as "green fruit herbal medicine", which has the effects of soothe liver, invigorating stomach and qi, anti-inflammatory and relieving cough.

Citrus × aurantium Linnaeus is a woody plant of the Citrus genus in the Rutaceae family. Branches have long spines; The leaves are ovate oblong or elliptical in shape; The sepals are hairless, and the petals are slightly smaller than those of grapefruit flowers; The fruit is spherical or flattened, with a thick and difficult to peel skin that is orange yellow or vermilion red in color, uneven and uneven. The flesh has a sour and sometimes bitter taste. The fruiting period is from October to November. When grapefruits hang, the distance between the fruits is very close, usually in clusters, and the fruits of grapefruits are not large.

Citrus × aurantium Linnaeus is a woody plant of the Citrus genus in the Rutaceae family. Branches have long spines; The leaves are ovate oblong or elliptical in shape; The sepals are hairless, and the petals are slightly smaller than those of grapefruit flowers; The fruit is spherical or flattened, with a thick and difficult to peel skin that is orange yellow or vermilion red in color, uneven and uneven. The flesh has a sour and sometimes bitter taste. The fruiting period is from October to November. When grapefruits hang, the distance between the fruits is very close, usually in clusters, and the fruits of grapefruits are not large.

Grapefruit (Citrus × aurantium Linnaeus) is a woody plant of the Citrus genus in the Rutaceae family. Branches have long spines; The leaves are ovate oblong or elliptical in shape; The sepals are hairless, and the petals are slightly smaller than those of grapefruit flowers; The fruit is spherical or flattened, with a thick and difficult to peel skin that is orange yellow or vermilion red in color, uneven and uneven. The flesh has a sour and sometimes bitter taste. The fruiting period is from October to November. Grapefruits are very close to each other when they hang, usually in clusters. Because the fruits of grapefruits are not large and look like grapes hanging, they are called grapefruits.

Grapefruit (Citrus × aurantium Linnaeus) is a woody plant of the Citrus genus in the Rutaceae family. Branches have long spines; The leaves are ovate oblong or elliptical in shape; The sepals are hairless, and the petals are slightly smaller than those of grapefruit flowers; The fruit is spherical or flattened, with a thick and difficult to peel skin that is orange yellow or vermilion red in color, uneven and uneven. The flesh has a sour and sometimes bitter taste. The fruiting period is from October to November. Grapefruits are very close to each other when they hang, usually in clusters. Because the fruits of grapefruits are not large and look like grapes hanging, they are called grapefruits.

Citrus × aurantium Engl. is a small tree in the Rutaceae family, belonging to the citrus genus. Its racemes have few flowers, sometimes accompanied by axillary single flowers; The fruit is spherical or flattened in shape, with a thick skin that is difficult to peel off. It is orange yellow or vermilion in color, with large oil cells and uneven surfaces. The flesh has a sour and sometimes bitter taste; Leaves ovate oblong or elliptical, entire margin or with shallow teeth, petioles and wings ovate; The flowering period of lime is from April to May, and the fruiting period is from November to December.