I love common plant names. They are often so apt for the plant context. Sometimes the name is lost in the mists of time. Sometimes we make up a word for the plants before we know what others call them.
I've always called Fuchsia the 'Ballerina bush' because the flowers look like little dancers.
My Gran used to have lovely Fuchsias and we were told off for popping the flower buds!
Dicentra spectabilis has flowers that are definitely like a "lady in a bathtub"!
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and I think I'm going to have to call my bladdernut a "testicle tree" instead!