Ruurd Dirk Hoogland

July 24, 1922 – November 18, 1994

Kingdom of the Netherlands

Dilleniaceae

Collected Dilleniaceae and identified Dilleniaceae

Collected Moraceae and identified Apocynaceae

Jan Frederik Veldkamp

March 31, 1941 – November 12, 2017

Kingdom of the Netherlands

Poaceae

Collected Poaceae and identified Poaceae