Graham flour is another name for unsifted whole-wheat flour, a coarse-textured flour ground from the entire wheat kernel (bran, germ, and endosperm).

Whole-wheat flour comes from whole, unbleached wheat, which conatins the bran nor the germ. This product contains all the fiber, minerals, vitamins and lipd from both the bran and germ.

The bran and germ can then be added back to the white flour to make whole wheat flour (also called whole grain flour).
[note: always read the packaging]