what trees do acorns come from

Acorns come from oak trees, which are part of the genus Quercus. There are hundreds of species of oak trees around the world, with about 90 oak trees native to the US. Acorns are the fruit or nut of an oak tree, and each acorn contains a single seed encased in a tough outer shell. Acorns are an essential food source for many animals, including squirrels, deer, and birds. However, raw acorns contain tannins that taste bitter and can be toxic to humans and animals if consumed in large amounts. To make acorns edible for humans, they need to be leached to remove the tannins.