<http://www.nps.gov/plants/alien/pubs/midatlantic/phau.htm>. Phragmites australis Phragmites Common Reed (Phragmites australis) Phragmites ecologically damaging invasive weeds common reed (Phragmites australis) common reed (Phragmites australis) ecologically damaging invasive weeds invasive species U.S. National Park Service: Common Reed