Mandarin oranges or tangerines are native fruits from China and northeastern India with (amazingly) eight different kinds of varieties. This citrus is one of the five kinds available in the market along with pummelos, citrons, kumquats, and papedas. However, there are (amazingly) eight different tangerines out there (namely W. Murcott Afourer, Page, Daisy SL, Dekopon, Ruby Tango, Seedless Kishu, Pixie, and Gold Nugget). The link above best sums up the characteristics of each orange.
While this article provides an interesting insight, I’m wondering if the FDA or grocery stores have any certain allocations in their fruit sections in terms of different types of (for example) oranges that they sell? Or do grocery stores choose which types of specific fruits they want to sell?