The so called Indian Corn you get in the fall that is multi colored is just one variety of "Indian Corn" it was common to the South-west region and is somewhat drought resistant. The different tribes in the different regions had many kinds of corn that was white, blue, red yellow and multi-colored and included dent corn, flint corn, sweet corn, pop corn and even some husk cork where each kernel had it's own husk.
BTW way, that calico corn makes some of the best roastin' ears I've ever ate, and I mean roastin' ears, not boilin' ears.