| 2007 |
Department of Zoology of the Comenius University, Bratislava, Slovakia. |
| 2006 |
Missouri Botanical Garden, St. Louis, U.S.A. |
| 2005 |
Zoological Institute of the Russian Academy of Sciences, St Petersburg, Russia |
| 2004 |
University of Canterbury, Christchurch, New Zealand (hosted by Landcare Research) |
| 2003 |
Instituto Gulbenkian de Ciência, Oeiras, Lisboa, Portugal |
| 2002 |
CRIA, Indaiatuba, Campinas, Brazil |
| 2001 |
Royal Botanic Gardens, Sydney, Australia |
| 2000 |
Senckenberg Museum, Frankfurt am Main, Germany |
| 1999 |
Harvard, Cambridge, USA (Harvard University Herbaria) |
| 1998 |
Reading, England (Centre for Plant Diversity and Systematics) |
| 1997 |
Taipei, Taiwan (Academia Sinica - IUBS 26th General Assembly) |
| 1996 |
Toronto, Canada (Royal Ontario Museum) |
| 1995 |
Madrid, Spain (Real Jardin Botanico - CSIC) |
| 1994 |
Paris, France (IUBS 25th General Assembly) |
| 1993 |
Washington, USA (Smithsonian Institute) |
| 1992 |
Xalapa, Mexico (Instituto de Ecologia) |
| 1991 |
Canberra, Australia (Australian National Botanic Gardens) |
| 1990 |
Delphi, Greece (European Cultural Centre) |
| 1989 |
Las Palmas, Gran Canaria (Jardin Botanico) |
| 1988 |
St Louis, USA (Missouri Botanic Gardens) |
| 1987 |
Edinburgh, Scotland (Royal Botanic Gardens) |
| 1986 |
Pittsburgh, USA (Hunt Institute) |
| 1985 |
Geneva, Switzerland (Conservatoire et Jardin botaniques) |