I figured that Americana included Folk, and vice versa. When I was studying business, there was a section in the main text-book about radio formats. The "Americana" radio format was described as stations that play folk music(traditional or not), traditional blues, and "real" traditional country music. It called it real country since the country music in the "Country" format plays modern country which it's too closely related to pop and rock.

On the television:
There is a "Folk Roots" channel that the digital cable company provides with the Galaxie package, that plays different types of folk music. It includes Bluegrass and Celtic. They also have a Country Classics, which plays traditional country music like Hank Williams, Johnny Cash,, and Patsy Cline. And, a Hot Country channel which plays today's country like Taylor Swift.