Forest plant invasion intensity (percent of forested plots with an invasive plant recorded for a given county based on FIA sampling) for the United States including estimates of region-wide invasion intensity.

  Part of: Oswalt CM, Fei S, Guo Q, Iannone III BV, Oswalt SN, Pijanowski BC, Potter KM (2015) A subcontinental view of forest plant invasions. NeoBiota 24: 49-54.