''Citrus mangshanensis'', the mangshanyegan (), is a wild citrus fruit species. The mangshanyegan is native to mountain forests in Mangshan,

Hunan Hunan (, ; ) is a landlocked province of the People's Republic of China, part of the South Central China region. Located in the middle reaches of the Yangtze watershed, it borders the province-level divisions of Hubei to the north, Jiangxi ...

province, China, where it was first reported in the 1980s. It is genetically distinct from the

mandarin orange The mandarin orange (''Citrus reticulata''), also known as the mandarin or mandarine, is a small citrus tree fruit. Treated as a distinct species of orange, it is usually eaten plain or in fruit salads. Tangerines are a group of orange-colou ...

, with which it has morphological similarities, and the term 'Mangshan wild mandarins' as well as the species name ''C. mangshanensis'' have been used both for the mangshanyegan and for wild true mandarins of the same region. Genomic sequencing shows the mangshanyegan to be one of a small number of pure (non-hybrid) citrus species, having diverged from other members of the genus at the initial branching of ''Citrus'' radiation in the Late

Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...

. It is genetically similar to another wild citrus of the region, the ''yuanju''.

References

mangshanensis {{Rutaceae-stub