The dried roots of Rheum, of which there are several species.
HABITAT.--China and Thibet.
PROPERTIES.--When powdered it is of a bright orange-yellow, odor
characteristic; taste bitter, astringent; gritty when chewed.
DOSE.--As a stomachic--Horses and cattle, 1 to 2 ozs.; sheep, 1 dr.;
dogs and cats, 5 to 10 gr.
As a mild purgative--Foals and calves, 1 to 2 dr.; dogs and cats, ¹⁄₂ to
2 dr.; poultry, 5 to 10 gr., in pill.