Orange (fruit)
Hybrid citrus fruit, widely cultivated for sweet flavor.
The orange, also called sweet orange to distinguish it from the bitter orange (Citrus × aurantium), is the fruit of a tree in the family Rutaceae. Botanically, it is the hybrid Citrus × sinensis, between the pomelo (Citrus maxima) and the mandarin orange (Citrus reticulata). It is widely grown in tropical and subtropical areas for its sweet fruit, which can be eaten fresh or processed for juice or peel.
- Scientific name
- Citrus × sinensis
- Family
- Rutaceae
- Origin
- Southern China, Northeast India, Myanmar
- Global production (2024)
- 67 million tonnes
- Top producer (2024)
- Brazil (23% of total)
Lore & Background
The sweet orange arose in domestication in East Asia as a cross between a non-pure mandarin orange and a hybrid pomelo with a substantial mandarin component. Its chloroplast genome, and therefore maternal line, is that of pomelo. Genomic analysis shows the sweet orange is approximately 42% pomelo and 58% mandarin. All varieties descend from this prototype cross, differing only by mutations selected during agricultural propagation. The sweet orange has given rise to many further hybrids, including the grapefruit, clementine, and murcott.
Reader's Guide
The sweet orange has had its full genome sequenced. It is a relatively small evergreen tree, averaging 9 to 10 m in height, with oval leaves and crenulate margins. The fruit is a hesperidium, a modified berry, with a grainy rind ranging from bright orange to yellow-orange, and contains about ten carpels filled with juice vesicles. The sweet orange is non-climacteric, not ripening off the tree. It is subdivided into four classes: common oranges, blood oranges, navel oranges, and acidless oranges. The fruit has featured in human culture since ancient times, appearing in Chinese art centuries before its first Western depiction in Jan van Eyck's Arnolfini Portrait. By the 17th century, orangeries became items of prestige in Europe, as seen at the Versailles Orangerie.
Did You Know?
- The sweet orange is a hybrid between pomelo and mandarin orange, with pomelo as the maternal parent.
- The sweet orange has given rise to hybrids including the grapefruit, clementine, and murcott.
Frequently Asked Questions
What is Orange (fruit)?
The orange is a sweet citrus fruit borne by a tree in the Rutaceae family, botanically classified as the hybrid Citrus × sinensis. It is the offspring of a pomelo crossed with a mandarin orange.
What is Orange (fruit)'s scientific classification?
Its scientific designation is Citrus × sinensis, placing it within the Rutaceae family. It is a hybrid resulting from the cross between Citrus maxima (pomelo) and Citrus reticulata (mandarin orange).
How does Orange (fruit) differ from bitter orange?
The sweet orange (Citrus × sinensis) is set apart from the bitter orange (Citrus × aurantium) primarily by its noticeably sweeter flavor. The qualifier 'sweet orange' exists specifically to avoid confusion with its tart, bitter relative.
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