It sure is, sadly it's not really useful as a recreational drug, unless you're into deleriums. I've been looking to buy B. disticha as well as various other (mainly bulbous) African plants that reportedly have medicinal or psychoactive properties. Not only because of their uses, but for ornamental purposes as well. Was researching the list of possibilities a week ago or so when I stumbled upon this thread amongst other things, hence me resurrecting it from the dead. Here's the paper Yeti posted (in post #22); the link has dissolved into thin air, plus another article from Sobiecki.
Btw, if anyone can dig up the following, that'd be great: "ACS Symposium #1021: African Natural Plant Products: New Discoveries and Challenges in Chemistry and Quality by Chi-tang Ho".
264.pdf
sobiecki.pdf