The Editorial Board of the Acta Botanica Neerlandica most willingly extends hospitality to the Committee in Honour of Dr E. Reinders on his retirement as Professor of Botany, Agricultural University, Wageningen. The contributions to this number of the Koninklijke Nederlandse Botanische Vereniging’s journal have been sent from diverse quarters from at home and abroad and are as many diverse tokens of esteem and regard for Reinders’s activities.