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The orange is the fruit of the citrus species Citrus sinensis in the family Rutaceae. It is also called sweet orange, to distinguish it from the related Citrus aurantium, referred to as bitter orange. The sweet orange reproduces asexually (apomixis through nucellar embryony); varieties of sweet orange arise through mutations.
The orange is a hybrid between pomelo (Citrus maxima) and mandarin (Citrus reticulata). It has genes that are ~25% pomelo and ~75% mandarin; however, it is not a simple backcrossed BC1 hybrid, but hybridized over multiple generations. The chloroplast genes, and therefore the maternal line, seem to be pomelo. The sweet orange has had its full genome sequenced. Earlier estimates of the percentage of pomelo genes varying from ~50% to 6% have been reported.
Sweet oranges were mentioned in Chinese literature in 314 BC. As of 1987, orange trees were found to be the most cultivated fruit tree in the world. Orange trees are widely grown in tropical and subtropical climates for their sweet fruit. The fruit of the orange tree can be eaten fresh, or processed for its juice or fragrant peel. As of 2012, sweet oranges accounted for approximately 70% of citrus production.
In 2013, 71.4 million metric tons of oranges were grown worldwide, production being highest in Brazil and the U.S. states of Florida and California.
Here you can download free PNG images on theme: Orange PNG image free download
In this gallery "Orange" we have 57 free PNG images with transparent background.
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Orange PNG image
Res.: 2381x2463
Size: 7182 kbDownload
Cut orange PNG
Res.: 2381x2463
Size: 7182 kbDownload
Orange with leaves PNG image
Res.: 300x300
Size: 29 kbDownload
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Res.: 385x253
Size: 109 kbDownload
Three oranges PNG image
Res.: 354x238
Size: 155 kbDownload
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Res.: 413x331
Size: 117 kbDownload
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Res.: 512x512
Size: 382 kbDownload
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Res.: 400x341
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Orange with leaf PNG
Res.: 256x256
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Res.: 390x229
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Res.: 373x322
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Size: 248 kbDownload
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Res.: 250x250
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Res.: 600x442
Size: 91 kbDownload
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Res.: 600x397
Size: 371 kbDownload
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Res.: 600x373
Size: 337 kbDownload
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Res.: 320x315
Size: 95 kbDownload
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Res.: 600x597
Size: 301 kbDownload
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Res.: 800x800
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Res.: 800x600
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Res.: 510x510
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Res.: 800x402
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two oranges PNG image
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three oranges with leaves PNG image
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Oranges PNG
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Orange PNG image with gree leaves
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Size: 2540 kbDownload
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Res.: 2811x1944
Size: 2477 kbDownload
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Res.: 800x452
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Res.: 330x350
Size: 158 kbDownload
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Res.: 800x452
Size: 224 kbDownload
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Size: 5294 kbDownload
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Res.: 1365x1355
Size: 331 kbDownload
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Res.: 450x300
Size: 138 kbDownload
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Res.: 510x510
Size: 148 kbDownload
