Myrrh is a reddish-brown resinous material, the dried sap of a number of trees, but primarily from Commiphora myrrha, which is native to Yemen, Somalia, the eastern parts of Ethiopia, and Commiphora gileadensis, which is native to Jordan. The sap of a number of other Commiphora and Balsamodendron species is also known as myrrh, including that from Commiphora erythraea (sometimes called East Indian myrrh), Commiphora opobalsamum and Balsamodendron kua. The name "myrrh" is also applied to the potherb Myrrhis odorata otherwise known as "Cicely" or "Sweet Cicely". High quality myrrh can be identified through the darkness and clarity of the resin. However, the best method of judging the resin's quality is by feeling the stickiness of freshly broken fragments directly to determine the fragrant-oil content of the myrrh resin. The scent of raw myrrh resin and its essential oil is sharp, pleasant, somewhat bitter and can be roughly described as being "stereotypically resinous". When burned, it produces a smoke that is heavy, bitter and somewhat phenolic in scent, which may be tinged with a slight vanillic sweetness.