What Happens If You Eat Buttercups?

What Happens If You Eat Buttercups? Toxicity. All Ranunculus (buttercup) species are poisonous when eaten fresh, but their acrid taste and the blistering of the mouth caused by their poison means they are usually left uneaten. … The toxins are degraded by drying, so hay containing dried buttercups is safe. Can eating buttercups kill you?