Lupins? In MY cereal?!

From the allergy information on a packet of Spar (or Centra, or Londis, or one of those things) corn flakes:

May contain traces of peanuts, shell-fruits (nuts), soja and lupin

Okay, okay, peanuts, fine. Soja - I assume that's soya. Shell-fruits (nuts)?! Who on earth calls nuts 'shell-fruits'?

And then... oh, then... lupin. LUPIN. I mean, really, what?