Summer 1969
Obtained from Ruth Armitage, June 1998

The Brockengarten, a research and training site for mountain flora, in the Harz mountains. Karl Wyneken administered the garden in volunteer work from 1934-1945 and kept it going.

Obtained from: <http://www.biologie.uni-halle.de/bot/boga/nats_brock.html>;
When: May 2004