Honorary Members
Honorary President
| Sandro Pignatti | since 2009 |
Honorary Members
| Josias Braun-Blanquet | 1884-1980 |
| Hartmut Dierschke | since 2007 |
| Erich Hübl | since 2015 |
| Ljudevit Ilijanić | since 2015 |
| Erich Oberdorfer | 1905-2002 |
| Franco Pedrotti | since 2011 |
| Ivo Trinajstić | since 2015 |
| Kurt Zukrigl | since 2015 |