ver-failing study mate, Jan Ericsson, and staff at the Botanical Garden, Lund. Many measurements and samplings
were performed by a local farmer.
The scientific work involved intense collaboration and exchanges over the years with Professor emeritus
Bengt Nihlgård, Lund, who shared the final work. Scientifically, I am also indebted to Professor emeritus Göran
Ågren, Uppsala, whose collaboration was an essential factor in finalising this work.
The Swedish Natural Science Research Council provided the main funding for the research