i do remember that somewhere, but not exactly where, in his works, the real world indiana jones (in 1957!), dr charles muses, also hardcore mathematician, very early software and hardware engineer and a mystic (also known as a shaman), wrote something about what egyptians used.
anyway, he is worth reading for a whole bunch of reasons related to this forum.
edit.
could be that
Charles Muses, THE SACRED PLANT OF ANCIENT EGYPT, 1989
or that
"The Shamanic Way in Ancient Egypt" by Charles Muses
or coulld be multiple other works. i simply don't remember anymore. i don't even remember what the plant itself was...