A new natural hybrid of Pinguicula is here reported from the French Alps. It proceeds from the natural crossing of P. grandiflora Lam. subsp. rosea (Mutel) Casper with P. vulgaris L. subsp. vulgaris. The newly recorded hybrid is named Pinguicula × gresivaudanica because of the region where it has been discovered. The characters distinguishing this hybrid from other taxa are described, together with figures, a distribution map and a table. Fertility and chromosome number were also studied, supporting the hybrid nature of this plant.