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

Collected Bryaceae and identified Pottiaceae
Collected Asteraceae and identified Asteraceae

Collected Ranunculaceae

Collected Caryophyllaceae and identified Cistaceae

Collected Lejeuneaceae and identified Gymnomitriaceae
Collected Asteraceae and identified Peronosporaceae