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..
An excrescence on Quercus lusitanica Lamarck (nat. ord. Cupuliferae), caused by the punctures and deposited ova of Cynips Galls tinctoriae Olivier (class Insecta; order Hymenoptera.
Habitat - Levant.
Subglobular, 1 or 2 cm. in diameter, more or less tuber-culated above, otherwise smooth, heavy, hard; often with a circular hole near the middle, communicating with the central cavity; blackish olive-green or blackish-gray; fractute granular, grayish; in the centre a cavity containing either the partly developed insect, or purulent remains left by it; nearly inodorous, taste strongly astringent.
Incompatibles. - See Tannic and Gallic Acids, p. 593 and p. 596.
Dose, 1 to 2 fl. dr.; 4. to 8. c.c.
2. Unguentum Gallae. - Nutgall Ointment. Nutgall, 20; Ben-zoinated Lard, 80.