Gum Olibanum, from the tree Boswellia sacra?
Boswellia sacra scant regeneration; the mature trees that remain are apparently dying. Boswellia sacra Boswellia sacra (commonly known as frankincense or olibanum-tree) is a tree in the Burseraceae family. It is the primary tree in the genus "Boswellia" from which frankincense, a resinous dried sap, is harvested. It is native to the Arabian Peninsula (Oman, Yemen), and northeastern Africa (Somalia). This species of "Boswellia" is a small deciduous tree, which reaches a height of , with one or more trunks. Its bark has the texture of paper and can be removed easily. It has compound leaves and an odd number of leaflets,
Boswellia nana natural hybrid between "B. socotrana" and another "Boswellia" species (though which other species is, as yet, unknown). Some evidence for this is found in a solitary "Boswellia" tree discovered growing at the bottom of limestone cliffs at Hamadero; it displays some characteristics of both "B. nana" and "B. socotrana". Furthermore, this tree is growing in an area that lies ecologically in between the habitats of both species, sharing certain qualities. However, "B. nana" was thought (by botanists Mats Thulin and Abdul Nasser Al-Gifri, in 1998) to be a smaller form of "Boswellia popoviana". Boswellia nana Boswellia nana is a species