What is "mangshanyegan"

The Mangshanyegan (; also known, possibly incorrectly, as the Mangshan mandarin) is a wild citrus fruit species or group of species.

Its taxonomy and scientific name are an area of active research; it is called Citrus mangshanensis and Citrus nobilis Lauriro. It is native to mountain forests in Mangshan, Hunan province, China, where it was first reported in the 1980s. It is morphologically similar to cultivated Mandarin oranges, but is now known to be genetically distinct from both mandarins and pummelos.

Citrus crops are often propagated asexually, so they have low genetic diversity. The mangshanyegan is thus potentially important as a source of diversity for citrus breeders.