Sampling on the Kaiserstuhl (April 2000). This peculiar mountain of volcanic origin is situated in the midst of the Rhine valley and famous for its excellent wines. "Kaiserstuhl" means "emperor's chair".

From left to right: Kurt Ineichen, Prof. A. Bogenrieder (Institute for Geobotany, University of Freiburg, Germany), Dr. Fritz Oehl, Dr. Paul Mäder (FIBL).