The dried root of Convolvulus Scammonia. Syria and Asia Minor.

Characters. - Tap-shaped roots, often twisted, sometimes three inches in diameter at the top, brown without, white within, slightly odorous but tasteless. Ether agitated with the powder and evaporated leaves a residue having the properties of scammony resin.

Composition. - Resina Scammoniae (q.v.).

Preparations.

B.P.

Dose.

Resina Scammoniae...................................................................................

3-8 gr.

U.S.P.

Resina Scammonii ......................................................................................

4-8 gr.