NPS
Selected information for exotic plants and their control in Crater Lake National Park
Non Native Plants of Crater Lake National Park
Invasive Plant Management Report 2015
Invasive Plant Management Report 2013
Crater Lake National Park Exotic Plant Report 2011
Crater Lake National Park Exotic Plant Report 2010
Hypericum perforatum Integrated Pest Management Plan
Additional References from the National Park Service Integrated Resource Management Applications Database
Last updated: March 23, 2018