Henry Dissing

1931 – December 10, 2009

Kingdom of Denmark

Collected Pyronemataceae and identified Helvellaceae

Martha Allen Sherwood

November 08, 1948 – October 19, 2020

United States; United Kingdom

Parmeliaceae

Collected Parmeliaceae and identified Stictidaceae

Sigmund Sivertsen

1929 – May 28, 2019

Norway

Cyperaceae

Collected Cyperaceae and identified Cyperaceae