Diarrhena

Diarrhena, or beakgrain, is a genus of Asian and North American plants in the grass family.
; SpeciesDiarrhena americana P. Beauv. - east-central United States Diarrhena fauriei Ohwi - Shandong, Jilin, Heilongjiang, Liaoning, Japan, Korea, PrimoryeDiarrhena japonica Franch. & Sav. - Japan, Jeju-do, Kuril, Jilin, Heilongjiang, LiaoningDiarrhena mandshurica Maxim. - Jilin, Heilongjiang, Liaoning, Primorye, Amur, Khabarovsk, Korea, Hebei, ShanxiDiarrhena obovata Brandenburg - Ontario, east-central United States
; formerly included
see ''Ammophila Catabrosa Cutandia Sphenopus Vulpia''