The leaves of Barosma betulina and other species of the same family, from Southern Africa. They contain volatile oil and a bitter extract.

Buchu is slightly tonic, owing to its bitter principle. It is also a stimulating diuretic, and has some alterative power.

Fluidextractum Buchu. Fluidextract Of Buchu

Average dose,  xxx., well diluted. 2 mils. Ruta (Rue). Not official.

The leaves of Ruta graveolens, or garden rue. The active principle is a volatile oil, of hot and bitter taste. Rue is a carminative and emmenagogue. In large doses it is irritant and will cause abortion. It is less powerful than savine.

Dose of the oil, Oleum Rutae,  i.-0.05 mil.