In 2002, The Republic of Palau requested assistance from the US Department of Agriculture, Forest Service, Institute of Pacific Islands Forestry, to conduct a survey of invasive plant species of environmental concern. A comprehensive survey of the entire country was conducted and a report of the findings was submitted to the Government of Palau in 20032. This superseded a more cursory survey of the major species of environmental concern conducted in 19983. The present survey was requested as a follow-up to the 2002 survey.