The stalks are edible (when leavened by pounds of sugar), but the leaves are poisonous due to a high Oxalic acid content.
In case you are ever invited for tea by Mrs. rlmorel
Hahahaha...I only worry when her voice gets icy calm and quiet and she says “That’s fine. You have to sleep sometime.”
The one thing I remember about rhubarb, is that during WWII, when rationing was in effect in the UK, people were coming up with all kinds of ways to scrimp and save on food costs, and the newspapers were printing these suggestions. One recommended using the leaves in a salad, and the newspaper had to print a retraction the next day!............