#

Year

Location

President

Secretary-General

1st

1884

Vienna, Austria

Dr. G.F.R. Radde

Dr. Gustav von Hayek

2nd

1891

Budapest, Hungary

Prof. Victor Fatio, Otto Herman

none

3rd

1900

Paris, France

Dr. Émile Oustalet

Jean de Claybrooke

4th

1905

London, United Kingdom

R. Bowdler Sharpe

Dr. E.J.O. Hartert, J. Lewis Bonhote

5th

1910

Berlin, Germany

Prof. Dr. Anton Reichenow

Herman Schalow

6th

1926

Copenhagen, Denmark

Dr. E. J. O. Hartert

E. Lehn Schioler

7th

1930

Amsterdam, Netherlands

Prof. A.J.E. Lönnberg

Prof. L.F. de Beaufort

8th

1934

Oxford, United Kingdom

Prof. Erwin Stresemann

Rev. F.C.R. Jourdain

9th

1938

Rouen, France

Prof. Alessandro Ghigi

Jean Delacour

10th

1950

Uppsala, Sweden

Dr. Alexander Wetmore

Prof. Sven Hörstadius

11th

1954

Basel, Switzerland

Sir Landsborough Thomson

Prof. Adolf Portmann

12th

1958

Helsinki, Finland

Prof. J. Berlioz

Dr. Lars von Haartman