PROF. M. J. SIBKS (Wageningen, Netherlands), secretary of the above Union, reports that the next General Assembly will probably be held in July 1940 at Stockholm immediately before the seventh International Botanical Congress. The president is Prof. E. D. Merrill (Harvard) and the vice-president, Prof. D. M. S. Watson (London). The report in NATURE (136, 612 ; 1935) on the International Botanical Congress at Amsterdam in September 1935 referred to the establishment of a liaison between the Congress and the Union. Dr. F. Verdoorn (Leyden), secretary of the Botanical Section of the Union, reports on the work of this Section, which was deputed to execute the resolutions passed by the Congress and to assist the various commissions and committees then appointed. He reports that an index of current plant science periodicals, prepared by the Commission for Documentation, will be issued during 1937, and that the Commission for Urgent Taxonomic Needs is preparing an "Index Herbariorum". Suggestions or questions bearing on botanical nomenclature should be sent to Dr. T. A. Sprague, Royal Botanic Gardens, Kew, secretary of the Commission of Nomenclature.