Introduction On 10 September 1867, at the annual general meeting of the Swiss Natural History Society, Simon Schwendener shocked the scientific world with his paper on the Dual Hypothesis of Lichens (Honegger, 2000).
Introduction On 10 September 1867, at the annual general meeting of the Swiss Natural History Society, Simon Schwendener shocked the scientific world with his paper on the Dual Hypothesis of Lichens (Honegger, 2000).