Peter Hans Hovenkamp

* October 09, 1953 – July 12, 2019 †

Kingdom of the Netherlands

Polypodiaceae

Collected Polypodiaceae and identified Polypodiaceae

Kazimierz Karczmarz

* May 07, 1933 – July 20, 2011 †

Poland

Characeae

Collected Characeae and identified Calliergonaceae

Collected Moraceae and identified Apocynaceae