Citrus unshiu is a semi-seedless and easy-peeling citrus species, also known as miyagawa mandrin, unshu mikan, cold hardy mandarin, satsuma mandarin, satsuma orange, naartjie, and tangerine. Its fruit is one of the sweetest citrus varieties. It is usually seedless and is about the size of other mandarin oranges (Citrus reticulata). Satsumas are known for their loose, leathery skin; the fruit is very easily peeled compared to other citrus fruits. The rind is often smooth to slightly rough with the shape of a medium to a small flattened sphere. Satsumas are cold-hardy, and when planted in colder locations, the fruit becomes sweeter from the colder temperatures.
In botany, a fruit is a seed-bearing structure in flowering plants formed from the ovary after flowering.
Fruits are how flowering plants disseminate their seeds. Edible fruits, in particular, have long propagated using the movements of humans and animals in a symbiotic relationship that is the means for seed dispersal for the one group and nutrition for the other; in fact, humans and many animals have become dependent on fruits as a source of food.