The orange, also known as the or mandarine (both lower-case), is a small citrus

Citrus

Citrus is a common term and genus of flowering plants in the rue family, Rutaceae. Citrus is believed to have originated in the part of Southeast Asia bordered by Northeastern India, Myanmar and the Yunnan province of China...

 tree (Citrus reticulata) with fruit resembling other oranges

Orange (fruit)

An orange—specifically, the sweet orange—is the citrus Citrus × sinensis and its fruit. It is the most commonly grown tree fruit in the world....

. Mandarin oranges are usually eaten plain or in fruit salads. Specifically reddish-orange mandarin cultivars can be marketed as tangerine

Tangerine

__notoc__The tangerine is an orange-colored citrus fruit which is closely related to the Mandarin orange . Taxonomically, it should probably be formally named as a subspecies or variety of Citrus reticulata; further work seems to be required to ascertain its correct scientific name...

s, but this is not a botanical classification.

The tree is more drought-tolerant than the fruit.