REVIEWS

Book reviewed in this article:
The Cell Cycle in Development and Differentiation . Ed. by M. B alls and F. S. B illett .
Lehrbuch der Pflanzenphysiologie . By E ike L ibbert .
Flora Aegaea. By K. H. fil. RECHINGER.
Evolution in Plants. Ed. by G. VIDA.
Past and Present Vegetation in the Isle of Skye. A Palaeoecological Study. By H. J. B. BIRKS.