Introduction. The present war emergency has put thousands of United States troops into the field in various parts of the American tropics. By far the greater number are concentrated in the Canal Zone or adjacent Panama where they are in almost daily contact with strange plants of a potentially poisonous or injurious nature. The number of cases admitted to Army and Civilian hospitals are sufficient proof that unfamiliarity with these plants too often leads to loss of manpower by the armed forces.
The list of plants as here given is probably guilty of many sins both of omission and commission. Plant species having highly injurious properties have undoubtedly been overlooked, and others here included will be found to have been based on insufficient observation, or to be of trivial importance. An appeal is made to medical officers throughout the Caribbean area to note such inconsistencies as may come to their attention.