The bark of Rhamnus Persiana de Candolle (nat. ord. Rhamnaceae).
Collected at least one year before being used.
HABITAT.--United States from Northern Idaho west to the Pacific Ocean.
PROPERTIES.--Externally the bark is reddish-brown. Internally yellowish
to light brownish, becoming dark with age. Odor distinct; taste bitter
and slightly acrid.
CONSTITUENTS.--Three resins; a neutral body; a volatile oil; malic and
tannic acids.
DOSE.--Dogs, 5 to 30 gr.; cats, 1 to 5 gr.