Redbud, or Cercis canadensis, the Oklahoma state tree, may be found throughout the state on the edge of forests, in open meadows and roadside ditches. The 7-15 cm long, ovate leaves do not sport the lobes of the traditional oak leaf. The oak tree is amongst the most commonly seen trees and can be found in North America, Europe and in tropical regions of Asia. Redbud is a widely used landscape tree in both county and urban landscapes. oak tree identification . H ave a beautiful oak tree picture that you think might look good on our Tree Pictures site, just send us your tree picture, please include the type of tree it is if you know. The nut of the acorn grows from a woody cup, which may remind you of a head wearing a hat. Click here for more information and pictures. Some oak leaves also emerge in a red or pink shade in early spring, but quickly change to their standard green color by summer. The leaves of the red oak (also called champion oak) are 12-25 cm long, have red-colored midveins and reddish-brown veins. Sinuses may be variably deep, shallow, wide, or narrow. The bark color of oaks ranges from whitish-gray to dark, almost black. The leaves change color in fall taking on a bright gold or scarlet or russet hue. Quercus macrocarpa (bur oak) 10. Another easy way to identify this leaf type is by noticing that this leaf is geometrically flat. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/f\/f1\/Identify-Oak-Trees-Step-1-Version-2.jpg\/v4-460px-Identify-Oak-Trees-Step-1-Version-2.jpg","bigUrl":"\/images\/thumb\/f\/f1\/Identify-Oak-Trees-Step-1-Version-2.jpg\/aid1611790-v4-728px-Identify-Oak-Trees-Step-1-Version-2.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"