The surviving forests are often oak, hickory, ash, pine. A different blight is working its way through the Eastern Hemlock, which are truly the giant sequoias of the East. Humongous old trees.

Also, corn, wheat, rice, tobacco, towns, cities, suburbs. Probably a third of the US population lives in that green area, to include Washington DC, New York City, Boston, Philadelphia, Altoona, Pittsburgh, Nashville, Memphis, Charlotte, Asheville, Atlanta...looks like it misses Colombia and just barely grazes Raleigh.

Stumps and other trees. And of course, a ton it was leveled for housing/infrastructure/etc

Captainaggravated had some great info a few comments down about the remains of the forest if you want to know more!