La P. x hans in effettti si riferisce ad un cultivar della P. x tina come viene riportato in questo appunto:
Pinguicula “Hans” is not the real name for this plant; it is the cultivar P. 'Tina'. Unfortunately the name had faded on the label of the plant used to propagate all these Pings. All that was left was the name “Hans” on the reverse and so they called it “Hans”. Hans Luhrs, the Dutch Ping expert, was the original source of this plant and he told me this story. Vic Brown 6 Nov 03. Commenbts below are from Joseph Clemens.