In Spain they associate with sweet chestnut. Chocolate may be used as an ingredient in sweet chestnut pie. The woodland features oak, birch, rowan, alder, ash, hornbeam and sweet chestnut. The churchyard is notable for a number of sweet chestnut trees. Beech is common and sweet chestnut has grown here for many centuries. No other evidence of sweet chestnut in Roman Britain has been confirmed. It got its name because of the surrounding magnificent sweet chestnut forests. Sweet chestnut is suited for human nutrition. Sweet chestnut pie may be prepared as a cream pie. Nuts of the European sweet chestnut are now sold instead in many stores. At the southeast edge of the forest are good examples of Sweet Chestnut and Yew. The galls can also become infected by the sweet chestnut pathogen "Gnomoniopsis smithogilvyi". Sweet chestnut is also appreciated in a gluten-free diet. Sweet chestnut trees live to an age of 500 to 600 years. The Corsican variety of polenta (called "pulenta") is made with sweet chestnut flour.