Yes, it's deadly...
the seed, that is.
This is a seed head from one of my Castor Bean plants. If you have an area where you need a quick growing screen, this is a great choice. Planted from seed in the late spring, it quickly grows 10-15 ft, providing great screens to cover fences, ugly buildings, or your neighbors view. Sadly, they are an annual, but when they grow this fast it almost doesn't matter!
Just make sure no one gets a hold of one of the seeds! They are deadly. Just one seed can take out a full grown man. Don't let this keep you from planting them though! Just make sure the seeds ends up in the ground, and not in someone's mouth! Easy enough!
I didn't take this picture, but it shows how huge their beautiful, glossy leaves get!