Phragmites Reed

(Phragmites australis ssp. australis)
2014-8-15 Bombay Hook NWR, DE
two types of phragmites (American or alien invasive) but they can hybridize

plants.usda.gov list 4 species occurring in US
1) the American native species
American Common Reed
(Phragmites australis ssp. americanus)
2) the European invasive
European Common Reed
(Phragmites australis ssp. australis)
3) a hybrid common reed
(Phragmites australis ssp. americanus × ssp. australis)
4) a subtropical common reed
(Phragmites australis ssp. berlandieri)
http://plants.usda.gov/core/profile?symbol=PHAU7

how to responsibly eradicate the invasive:
http://prezi.com/ey-u-kqvedxm/the-effect-of-phragmites-on-the-natural-plant-species-of-delaware/

how to ID and good descriptions
http://www.nps.gov/plants/alien/pubs/index.htm