Has collected with:
Brotherus, Viktor Ferdinand
* October 28, 1849 – February 09, 1929 †
Finland; Grand Duchy of Finland; Russian Empire

Collected Bryaceae and identified Pottiaceae
Collected Hyperoliidae and identified Opisthorchiidae
* October 28, 1849 – February 09, 1929 †
Finland; Grand Duchy of Finland; Russian Empire
Collected Bryaceae and identified Pottiaceae
Collected Hyperoliidae and identified Opisthorchiidae