Any Cephalotus can be micropropagated from seed; its vegetative (flat) leaves; the rhizome; and sections of its flower stalks. I have used all of them successfully, for years,. The challenge, as always, is effective sterilization of the explants, without killing the tissue. There were a few threads on Terraforums:
http://www.terraforums.com/forums/showthread.php?128901-quot-Eden-Black-quot-F1&highlight=Eden+black
Cephalotus follicularis "Eden Black x Self" (seed origin)
Cephalotus follicularis "Hummer's Gaint" (flat leaf origin)