It remained however an important staple food for the poors until the early 20th century;[3] the Siegfried Map introduced a specific symbol for chestnut groves in 1914.
[4] The maintenance of chestnut groves ceased during the 20th century due to diseases and declined after the massive exploitation of wood for tannin factories.
[3] Today, 98% of Swiss chestnut trees are found on the south side of the Alps (Ticino and the Grisons),[4] for instance in the Malcantone and Val Bregaglia.
Chestnut groves are also found in Valais, particularly in Fully and Saint-Gingolph,[5] and various other locations around Lake Lucerne and the Walensee.
Ticino restaurants and pastry chefs all over Switzerland also make vermicelli, an autumnal dessert consisting of a sweet chestnut purée and whipped cream.