This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
B. P., not official. - The concrete oleo-resin scraped off the trunks of Pinus taeda, Frankincense Pine, and Pinus australis, the Swamp Pine (nat. ord. Coniferae).
Southern United States.
When fresh it is a soft, yellow, opaque, tough, solid, becoming darker, dry and brittle by keeping. Odor and taste as of other Turpentines.
Uses of Frankincense.
Frankincense is used for the same purposes as resin (see p. 523).