Ellenberg, H., Esser, K., Merxmüller, H., Schnepf, E. & Ziegler, H. (eds.), Progress in Botany. Morphology, Physiology, Genetics, Taxonomy, Geobotany.– Fortschritte der Botanik. Morphologie, Physiologie, Genetik, Systematik, Geobotanik. Vol. 36. 16 figs., XVIII + 359 p. Springer-Verlag, ISBN 3–540–07036–2. Berlin, Heidelberg, New York, 1974. Cloth DM 98.–; US $ 40.20