R eviews

Biology and Control of Take‐All . Ed. by M. J. C. A sher and P. J. S hiptonBritish Fungus Flora: Agarics and Boleti 3. Bolbitiaceae: Agrocybe, Bolbitius and Conocybe . By R. W atling . Ed. by D. M. H enderson , P. D. O rton and R. W atlingPrinciples of Gene Manipulation. An Introduction to Genetic Engineering By R. W. O ld and S. B. P rimroseThe Biology of Seaweeds . Ed. by C. S. L obban and M. J. W ynneLes Végétaux dans la Biosphère. By P. O zendaCamellias of Yunnan. Composed by F eng K uo ‐M ei , X ia L i ‐F ang and D hu X iang ‐H ong , of Kunmin Botanical Institute, Academia Sinica, Kunmin, with Japanese translation and foreword by T akasi T uyama