It is now possible to offer additional notes on the uses of malpighiaceous plants of medicinal or toxicological nature by Indians in the northwest Amazon. Only occasionally have name changes been made. Thus, in great part, there is little need to alter the citation of the notes which I published earlier. My deepest appreciation goes to Dr. Anderson for the care and interest which he has shown in studying my malpighiaceous collections. The ethnopharmacological observations are the result of my field research in the Colombian Amazonia from 1941 through 1954. The genera and species are arranged alphabetically.