Acknowledgements
We would like to thank Adrian Moehl for his precious suggestions and for
collecting all the seed material in the wild; Sarah Dolder for all the
help in sowing, growing and tending to the plants used in the
experiment. Judith Hinderling, for helping cleaning the seed material.
Pascal Kipf, Tanja Falasca, Silja Eller for their help in
hand-pollination and seed counting.