My Dad had a notice on the kitchen cupboard "NO CUCUMBER!".

He had had unfortunate results from eating them. I have found that once they have gone past ripeness, they are the fastest way of cleaning out my gut imaginable.

My grandmother, after the war, during rationing, served it to my parents, but ate, herself, that part of the cucumber not fit for table while in the kitchen. She had to be rushed to hospital, which involved the police, who interviewed my mother, thinking that she had poisoned her mother for some reason. All cleared up OK, though.

The family includes one of the bryony varieties - can't remember which one, the other one is related to yams. Both of the bryonies are poisonous. Odd how major food plant families can have poisonous ones in them. Potatoes, carrots*, and this lot, Can't trust any you haven't grown yourself or bought. (Though my sister had a bad reaction to a tinned mushroom from a well known manufacturer.)

*And you can get skin reactions from parsnip leaves and stems.