Bas-Quercy (Quercy) is in the Lot Valley, south of the Dordogne, in southwest France. The region is popular for holidayers seeking a warm area that is reasonable in cost. I think the name is applied to songs from SW France, not just the Lot Valley.

Another 'Bas-Quercy' carol is "The Annunciation;" which is available in a translation by Edward Bliss Reed, arr. David Stanley Smith, 1923. Haven't found lyrics yet.

"Carol of the Flowers," (not the same as the 'Whence comes the rush of wings' carol) is known in Quebec and Prince Edward Island. First line- 'Come with us, sweet flow'rs.'