"In Trees and Toadstools, Rayner has given us an account, written in clear language understandable to the layman interested in science, of the symbiotic relationship which has been found to prevail between the of many of the higher fungi and forest trees. ... the story of 's epochal discoveries, originally initiated as a project to increase the supply of s but resulting in the real opening of research on the important field of forest tree root and fungus association, is well told in simple language."