Collecting ladanum from wild rockroses was done through two methods.
First was a process by which special absorptive materials such as cloth or hair was brushed over the top of the plants so that the oil built up on the fibers. It was then heated to release the oils under a more controlled extraction process. It is believed that the flail seen in the hands of gods and pharaohs of ancient Egypt was actually a ladanisterion, or ladanum collecting device.
The second method of harvest utilized the herds of goats that are so prevalent in this part of the world. As the goats browsed on rockroses, the oil accumulated in their beards. Each year the long beards of the goats were cut and the oil extracted. For the pharaohs, the false beards glued to the chin were in fact these ladanum-rich goat beards which would surround the man with the desired scent. This is origin of the name for such facial hair, the goatee.