From: La Belgique horticole, journal des jardins et des vergers founded by Charles François Antoine Morren and edited by Charles Jacques Édouard Morren.
Liège [Luik], La Direction Générale, 1872, volume 22 (plate 27).
Description: Lentibulariaceae - ''Pinguicula caudata'' - ''Pinguicula flos-mulionis'' From: La Belgique horticole, journal des jardins et des vergers founded by Charles François Antoine Morren and edited by Charles Jacques Édouard Morren. Liège [Luik]