The word “myrrh” comes from the Arabic word “mirrah”, meaning bitter. Bitter Myrrh is produced by trees and bushes of the Commiphora genus and although there are approximately 200 different species of Commiphora - all of whom can produce a myrrh type resin - only a few are suitable for incense. Of these the most significant are Commiphora molmol which produces the gum usually recognised as true Myrrh, and Commiphora.erythraea which produces the myrrh like gum called Opopanax. The gum-resin from Commiphora.mukal is known as Guggal and is from India.