REVIEWS

Review in this article: The Grass, Fern and Savannah Lands of Ceylon, their Nature and Ecological Significance. By C. H. H olmes . Guide to the National Pinetum and Forest Plots at Bedgebury. By W. D allimore , R. F. W ood and others. Edited for H.M. Forestry Commission by J. M acdonald and H. J. E dlin . Elementary Genetics. By W ilma G eorge . The Stipitate Hydnums of the Eastern United States. By W illiam C hambers C oker and A lma H olland B eere . Leaf Analysis. By H. L undegårdh , translated by R. L. M itchell . Trace Elements in Plant Physiology (Lotsya, Vol. 3, I.U.B.S. Colloquia, Series B., No. 1). Respiration et Métabolisme Azoté ( Etude de physiologie foliaire ) By A lexis M oyse . Manual of Phycology. An Introduction to the Algae and their Biology. Edited by G ilbert M. S mith . Recent Advances in the Study of Plant Viruses. By K enneth M. S mith . An Introduction to the Anatomy of Seed Plants. By E. L. S tover . Drawings of British Plants. Part V. Caryophyllaceae. By S tella R oss ‐C raig . Zur Lebensgeschichte des Schilfs an den Ufern der Schweizer Seen. Beiträge zur geobotanischen Landesaufnahme der Schweiz. Heft 30. By H ans H ürlimann . Vegetationskarte der Schweiz. In four sheets, I‐IV. Scale 1: 200,000. By E mil S chmid . Native Orchids of North America. By D. S. C orrell . Advances in Genetics. Vol. IV. Edited by M. D emerec . Flora of the British Isles. By A. R. C lapham , T. G. T utin and E. F. W arburg . Introduction to Mycology. By J. A. M acdonald .