Citron
A source of confusion is that "citron" or similar words in French (and other languages), and English are false friends, as they refer to the lemon. Indeed, into the 16th century, the English name "citron" included the lemon and perhaps the lime as well.
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.