Henbane is rare plant to find in wild. Easiest is to propagate seeds and grow in your garden or potted.

henbane

yes they are extremely poisonous, and is not to be eaten at all costs!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! :( :( :( :( :(, this means you!!!!!!!!!!!!!:( :( :( :( :(

At least a few of those will cut them tragically short. Off the top of my head I know that belladonna, hemlock, and henbane all contain compounds that are toxic.

The scientific or taxonomic name would be Hyoscyamus niger.