Since this silver jubilee does not mean the end of a career, let it merely be regarded as a landmark from which we may now look back. Herman Johannes Lam, born at Veendam in 1892, received his grammarschool education at the ‘Gymnasium Erasmianum’ in Rotterdam (1904—1911). He studied natural history at the State University of Utrecht (1911—1919) and enjoyed the privilege of having Prof. Dr A.A. Pulle as his teacher in systematic botany. In 1919 he obtained his doctor’s degree on a thesis “The Verbenaceae of the Malayan Archipelago etc.” which concluded his studies.