Hay fever plants. Their appearance, distribution, time of flowering and their rôle in hay fever, with special reference to North America. By Roger P. Wodehouse, Ph.D., Associate Director of Research in Allergy, Lederle Laboratories, Pear River, N. Y. Published by Chronica Botanica Co., Waltham, Mass.: New York, G. E. Stechert and Co. 1945. Two hundred forty‐five pages. Price $4.75