Some constituents of the poison ivy plant rhus toxicodendron by syme william anderson 1879 publication date 1906 topics poison ivy publisher baltimore the sun job printing office. Some constituents of the poison ivy plant rhus toxicodendron dissertation submitted to the board of university studies of the johns hopkins university in conformity with the requirements for the degree of doctor of philosophy by william anderson syme 1906 1906 the sun job printing office baltimore. Some constituents of the poison ivy plant rhus toxicodendron syme william anderson amazoncomau books. Leaves and flowers of the poison ivy plant were extracted with ether and the ether was removed by evaporation in the residue the following substances were found and studied gallic acid fisetin the sugar rhamnose and a poisonous tar gum or wax