The Willie Commelin Scholten Phytopathological Laboratory now known as the WCS-Foundation (In Dutch: Stichting Willie Commelin Scholten voor de Fytopathologie)[1] was a plant pathology research institute in the Netherlands.
Scholten née Commelin and named after their deceased son Willie who had been interested in plant pathology after training under Hugo de Vries.
Another institute of phytopathology was created at Wageningen and was directed by Ritzema Bos from 1905.
Following his departure, the laboratory was headed by Johanna Westerdijk, the first woman professor in the Netherlands.
The institute at Baarn was converted in 1964 into a repository for fungal cultures - ‘Centraalbureau voor Schimmelcultures’ (CBS).