EN
Cooperation between the dendrologists of what are now the Czech Republic, Slovakia and Poland goes back to the XIX century, when many Czech gardeners found work in Poland, among the most famous – Joseph Blaszek, Benedict Roezl and Peter Hoser. At the beginning of the XX century many aristocrats and owners of parks, as well as dendrologists, gardeners, and designers from those countries were members of the Austro-Hungarian Dendrology Society founded in Vienna in 1908, which was led by Arnošt Silva Tarouca and Camillo Schneider. Between the wars, even though there were newly formed dendrology societies in both countries, cooperation was not institutionalized, and was limited to individual contacts. After World War II, when in both Czechoslovakia and Poland dendrology societies were dissolved and became sections within botanical societies, contacts were much livelier and more creative. Between 1960–1988 there were ten international dendrological conferences, where the main participants were always Czechs, Slovaks and Poles, particularly at such centres of dendrological knowledge as Průhonice, Mlyňany i Nový Dvůr in Czechoslovakia and Kórnik, Rogów and Warszawa in Poland. The dendrological periodicals of both countries published many articles of each others work (the Polish Arboretum Kórnickie and Rocznik Dendrologiczny and the Czech Dendrologická sdělení and Folia Dendrologica), and for many years there was an active exchange of dendrologists of both Academies of Science – the Czechoslovak and the Polish.