"Black mold" is not a species or specific kind of mold, and neither is "toxic mold." When the media talk about "toxic mold" and "black mold", they are usually referring to molds that may produce toxic substances called mycotoxins. Often they are referring to a specific mold called Stachybotrys chartarum.
If you are concerned about mold in your home, please see:
You can obtain more information about mold from your EPA Regional Office or State Agency.