Orthilia Rafin.
Orthilia is a small genus of three species, all native in the northern hemisphere (only one variable species according to some authors; Freeman 2009). One species, Orthilia secunda, is most widespread, sometimes cultivated and has been recorded as an alien in Belgium.
Literature:
Freeman C.C. (2009) Orthilia. In: Flora of North America Editorial Committee (eds.), Flora of North America, vol. 8. Oxford University Press, New York-Oxford: 388-389.
Taxonomic name: