Citron
There are also a number of citron hybrids; for example, ponderosa lemon, the lumia and rhobs el Arsa are known citron hybrids, some are claiming that even the Florentine citron is not pure citron, but a citron hybrid.
Genoplesium citriodorum
The lemon scented midge orchid was first formally described in 1991 by David Jones and Mark Clements who gave it the name "Genoplesium citriodorum" and published the description in "Australian Orchid Research". In 2002, Jones and Clements changed the name to "Corunastylis citriodora". The specific epithet ("citriodorum") is derived from the Latin words "citrea" meaning "the citron-tree" and "odor" meaning "smell", referring to the strongly lemon-scented flowers.