There was some discussion on this song in rmf a couple of months ago - it may be worth seaching Deja News.

The song does exist in Songs Of The West (S Baring Gould) and it notes that "Flora Lilyof the West was won't to be sung annually at the Revel at St Brewards on the Bodmin Moors [Cornwall England] and can be traced back there to 1839" It also says that "the song is clearly of Irish Origin"

Jon