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The present volume of Persoonia is dedicated to Dr Cornelis (Kees) Bas, one of the founding editors of this journal, at the occasion of his eightieth birthday on 28 December 2008.
Kees Bas, born in Rotterdam, graduated in Biology at Leiden University in 1954, and started his life-long career at the National Herbarium of the Netherlands, University Leiden branch (then Rijksherbarium/Hortus Botanicus) in 1953 as curator for the fungi, in particular of the Agaricales. In the first period of his career he played a leading role, together with his colleague Rudi Maas Geesteranus, in modernising the collections and bringing together a well-annotated herbarium of Dutch and European higher fungi. Their activities form the basis of the present-day internationally valued collection of about half a million specimens of fungi in the National Herbarium. Kees specialised in the genus Amanita and, in 1969, he defended his PhD thesis on a world-wide revision of Amanita sect. Lepidella. From the very onset of his career, Kees freely shared his knowledge with others. His enthusiasm and energy gave a strong impulse to the Dutch Mycological Society, which developed in the fifties and sixties into a modern and active society with weekly excursions all over the country and forays to neighbouring mushroom hunting locations in Belgium and Germany.
Persoonia was initiated in 1959, and was successful from the start, with contributions not only from the Leiden mycologists, but also from a wide range of internationally renowned mycologists, such as R. Singer, J.T. Palmer, R.W.G. Dennis, E.J.H. Corner, M. Moser and others. From the sixties Kees was also involved in teaching, and over the course of many years several young mycologists were successfully supervised, including Eef Arnolds, Machiel Noordeloos, Thom Kuyper, Else Vellinga and Marijke Nauta. After his retirement, Kees continued his research at the institute until very recently. Most of his time was devoted to identification of interesting collections, but he also produced substantial papers, such as the revision of the genus Pseudobaeospora in Europe (Persoonia 18: 115–122. 2002).
The National Herbarium of the Netherlands, University Leiden branch and the Editors of Persoonia, as well as his students and many friends are thankful for Kees for his life-long interest in mycology and wish him and his wife Fenna many happy years to come.
Amanita basiana Tulloss & M. Traverso, Mycotaxon 77: 47. 2001.
Amanita basii Guzmán & Ram.-Guill., Bibliotheca mycologica 187: 11. 2001.
Marasmius cornelii Laessøe & Noordel., Persoonia 13, 3: 237. 1987.
Psathyrella basii E. Kits van Wav., Persoonia, Suppl. 2: 280. 1985.
Pseudobaeospora basii Adamčik & Ripková, Sydowia 56: 2. 2004.
Squamanita basii Harmaja, Karstenia 27, 2: 73. 1988 (1987).
compiled by Dr ME Noordeloos