Weed Risk Assessment: Lygodium microphyllum (Old world climbing fern), Lygodium japonicum (Japanese climbing fern), and Lygodium flexuosum
May 2009
PDF
669 KB
https://www.aphis.usda.gov/plant_health/plant_pest_info/weeds/downloads/wra/lyg…
USDA. Animal and Plant Health Inspection Service.
See also: Noxious Weeds Program Risk Assessments for more species