Organised by the Geobotanical Institute Rübel, Zurich, directed by Dr. <a href="https://de.wikipedia.org/wiki/Werner_L%C3%BCdi_(Botaniker)" class="extiw" title="de:Werner Lüdi (Botaniker)">Werner Lüdi</a>, 20-30 July 1936
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Unbekannt</div>
20 July 1936<div style="display: none;">date QS:P571,+1936-07-20T00:00:00Z/11</div>
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