The papers of Lambert Erickson span the years 1940 to 1980, with the bulk of the material covering the years 1940 to 1950. They were left in their received order and all folder headings were retained. The papers include abstracts of papers given at conferences, mimeographed "Weed Letters," class notes from Minnesota and Wyoming, and articles by Erickson. There are also many photographs of seed and weed experiments. Some of the material related to research conducted after Erickson's retirement, but it may be connected to projects he was working on. The papers are organized in two series: papers and photographs.