Diane Whitehead wrote "I can't think of any bulbs considered black..." A black hyacinth (garden hyacinth) is in the pipeline. One of the New York papers did an article on it earlier this year. There are black tulips, black bearded iris, black arilate iris, and of course Veratrum nigrum for starters. There are several aroids whose inflorescence can be fairly described as black. There are frits which look black to me. Aren't some of those South American things black? Jim McKenney Montgomery County, Maryland, USA, USDA zone 7, where black flowers are always welcome. On the other hand, if Diane meant plants whose bulbs are black, then that's a different list.