"The Knights Hospitaller apparently discovered what is popularly known as the Maltese fungus growing on the rock's flat top. This plant, which is a kind of parasitic flowering plant, not a fungus, has a repulsive smell. Doctors at the time believed that it had medicinal properties. The Knights used it as a styptic dressing for wounds and a cure for dysentery. They so prized it that they often gave gifts of it to distinguished noblemen and visitors to the Maltese islands." https://en.wikipedia.org/wiki/Fungus_Rock