This reference work provides by means of original drawings and concise text the key to identifying under the microscope, from dust, scraps, dry fragments and similar material, plants that are commonly used as drugs or as flavourings or additions to food. Based on their very successful, but long-out-of-print handbook, "Powdered Vegetable Drugs", (Churchill 1968), which this new atlas now supersedes, Drs Jackson and Snowden cover over 130 common plants, and a few more unusual ones. The detailed drawings and the tabular text placed on facing pages for ease of reference have been designed to aid speedy, precise and positive identification of plants from dry matter in the laboratory. The authors' experience and the success of this approach has made their identification methods a standard in pharmaceutical, forensic and food science laboratories world-wide.