This week, we are back with our ongoing series about the native trees of the Chicago area with a look at hickory trees.  Hickory trees (Carya sp.) are medium to tall deciduous trees known for their strong, dense wood and edible nuts.  Most species of hickory trees can be found in the eastern half of North America, from southern Canada down to northern Mexico, and there are some species found in India, China, and Indochina.  Hickory trees have...