Willow Oak

 

Photo: Matthew Richardson

 

Photo: Matthew Richardson

 
Unlobed linear leaves with bristel tip, about 1/2" wide, tend to be persistant.  Very small acorn.  Medium-dark bark, tight, shallow ridges and fissures.  Wet site oak, part of "green tree reservoirs" planted so waterfowl can have food.  Also planted as an ornamental.  Fagaceae.