The Citrus sinensis popularly known as sweet orange seed in Igbo of Nigeria is of the Rutaceae family. The seed is best sown in a greenhouse as soon as it is ripe after thoroughly rinsing it, sow stored seed in March in a greenhouse, germination usually takes place within 2-3 weeks at 130C. seedlings are liable to damp off so they must be watered with care and kept well ventilated. Citrus sinensis
Contains a wide range of active ingredients and research is still underway in finding uses for them. They are rich in vitamin c, flavonoids, acids and volatile oils. They also contain coumarins such as bergapten which sensitizes the skin to sunlight. Bergapten is sometimes added to tanning preparations since it promotes pigmentation in the skin, though it can cause dermatitis or allergy responses in some people. Some of the plants more recent applications are as sources of anti-oxidants and chemical exfoliants in spercified cosmetics. The fruit is an appetizer and blood purifier, it is used to allay thirst in people with fever and also treat catarrh. The fruit juice is useful in treatment of bilious infections and bilious diarrhea. The fruit rind is caminative and tonic cure for acne. The dried peel is used in the treatment of anorexia, cold cough etc.