This grower is sure of this plant identification.
Pinguicula Grandiflora hibernaculum in dormancy. These hibernaculum are mature flowering sized. Pot up in peat and perlite mix and keep moist and cool over the winter. Water only with rainwater. Keep in part sun, do not bake it in the summer. This isn’t a houseplant, keep outside.
Greater butterwort, Large-flowered butterwort, Butterwort
Pinguicula grandiflora (Greater butterwort). This species produces long yellow-green leaves. The flowers are large about 25mm wide purple or pink with a white throat.
They will grow in wet, mossy bogs.
Walls, rock garden