On my crypts, just on the under side they have developed hard "cyst" like bumps. the bumps look almost like a tick. Now they are growing black tufts of hair coming out of them. Is this BBA? i have never heard of the hard cysts associated with BBA. Sorry for the lack of pics. I removed the stuff and dipped them in permanganate. Some of the "cysts" left holes in the leaves after removing them.