Calamus

{kal’-am-us) [L., a reed]. Sweet flag. The rhizome of Acorus calavnis. It contains a volatile oil and acorin, a bitter nitrogenous principle. The root is an aromatic, stomachic tonic, and a common ingredient of many popular ” bitters.” C, Draco, a species of rattan-palm that affords a part of the so-called Dragon’s Blood of commerce. C, Ext., Fid. Dose tt^xv-fgj (1.0-4.0). C. script or i us (a writing pen or reed). The groove on the floor of the fourth ventricle, at the end of which is the ventricle of Arantius. 164