The bark of the root of Cornus florida.

Characters. - In curved pieces of various sizes, about one-eighth of an inch (3 millimetres) thick; deprived of the furrowed, brown-grey, corky layer; outer and inner surface pale-reddish, or light reddish-brown, striate; transverse and longitudinal fracture short, whitish, with brown, yellow striae; inodorous; astringent and bitter.

Dose. - 20 to 60 gr. (1-4 gm.)

Composition. - It contains a bitter neutral principle.

Action. - It acts as an astringent tonic and feeble stimulant to the stomach. It was formerly used in ague and malarious conditions, and a resinoid substance obtained from it by alcohol is popularly called dogwood-quinine.