Boreal Mannagrass, Northern Mannagrass, Small Floating Mannagrass: Glyceria borealis (Synonym: Panicularia borealis)
Tall Mannagrass: Glyceria elata (Synonym: Glyceria nervata var. elata)
American Mannagrass, Reed Mannagrass: Glyceria grandis var. grandis (Synonyms: Glyceria maxima ssp. grandis, Glyceria maxima var. americana, Panicularia grandis)
Davy Mannagrass, Narrow Mannagrass, Slenderspike Mannagrass: Glyceria leptostachya
Fowl Mannagrass: Glyceria striata (Synonyms: Glyceria nervata, Glyceria striata ssp. stricta, Glyceria striata var. stricta, Panicularia nervata, Panicularia striata)