Taxonomist and dendrologist P. C. de Jong, formerly on the faculty of the University of Utrecht and curator of the university's seven botanic gardens, is currently in charge of the Experimental Research Station in Boskoop. Dr. de Jong's special areas of interest are the genera Acer, Betula, Euonymus, and Lilium.Dr. H. J. Oterdoom, F. L. S., a retired thoracic surgeon of international repute, is a passionate collector of maples and former president of the Dutch Dendrology Society.D. M. van Gelderen is the principal author of several books on trees and shrubs. His family nursery, Firma C. Esveld in Boskoop, is one of the world's great specialist nurseries, famous for its conifers, maples, rhododendrons, and other woody plants. Among the awards D. M. van Gelderen has received in recognition of his contributions to horticulture are the Gold Veitch Memorial Medal of the Royal Horticultural Society and the Dutch Dendrological Society's Silver Doorenbos Medal. In 2000, he was named Officer in the Order of Oranje Nassau by Her Majesty Queen Beatrix of the Netherlands, in recognition of his work for the Royal Boskoop Horticultural Society and his contribution to horticultural literature.
