if your mum grows poppies for using in recipes, she's definitely growing opium poppies. And if you have some poppy seeds in your cupboard, that's the exact same poppy.

poppy seed is a common ingredient in central/east European deserts and you need a lot of it. And the poppy used - the breadseed poppy - is the exact same plant as the opium poppy. This isn't a 'hur dur opium recipes' thing, it is legitimately the same poppy. Those alkaloids that can make opium when harvested as latex degrade into something inert but tasty by the time the bud has turned to seed.

Alternatively if you have any carnation poppies, they are, once again, Papaver somniferum. Opium poppies.