This substance is described in the London Pharmacopia as a gum resin, the production of an uncertain species of Ferula.
The gum resin emitted from the cut root of Convolvulus Scammonia, Linn.
A gum resin, produced by an unknown plant which grows in Persia and Arabia.
The gum resin of the trunk contains 90% of anacardic acid and 10% cardol.
Olibanum is a gum resin, used to a limited extent in this country, in the manufacture of incense and pastilles.
The trunk exudes a gum resin in masses varying in color from red to yellow.