The orange is the fruit of the citrus species Citrus Sinensis in the family Rutaceae, native to China. It is also called sweet orange, to distinguish it from the related Citrus Aurantium, referred to as bitter orange.

The sweet orange reproduces asexually, varieties of sweet orange arise through mutations. Eating too many oranges has some uncomfortable side effects. When oranges are eaten in excess, the greater fiber content can affect digestion, causing abdominal cramps, and could also lead to diarrhea.

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