Boswellia frereana

Strappaghetti G, Corsano S, Craveiro A, Proietti G 1982 Constituents of essential oil of Boswellia frereana. Phytochemistry 21 2114-2115... 

Olibanum (frankincense) is one of a group known as the oleogum resins (mono-, sesqui-, di-, and triterpenes and mucous substances) that exude from incisions in the bark of the Boswellia trees (fam Burseraceae), the most common species of which are B. carterii (Sudan, Somalia, and Ethiopia) and B. serrata (India), whereas B. frereana (Oman, Somalia) and B. sacra (Arabia) belong to the rare resins on the market. 

Olibanum oil and olibanum resinoid are obtained from frankincense, which is a gum resin collected from the bark of the tree Boswellia carterii Birdw. or B. frereana Birdw. (Burseraceae) growing in Arabia and Somalia. The resinoid is produced by solvent extraction, and steam distillation gives the oil, which is a pale yellow, slightly viscous liquid with a balsamic odor and a faint lemon note. 

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