​BOSWELLIA, named after Dr. John Boswell, of Edinburgh, Scotland. A fine genus of terebinthinous trees belonging to the order amyridaceæ (amyrids). B. thurifera, called also B. serrata, furnishes the resin called olibanum, which is believed to have been the frankincense of the ancients. It is found in India, as also is B. glabra, the resin of which is used instead of pitch. The products of the entire genus are more or less used in pharmacy.