| Diarrhena | |
|---|---|
 | |
| Diarrhena americana | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Clade: | Commelinids |
| Order: | Poales |
| Family: | Poaceae |
| Subfamily: | Pooideae |
| Tribe: | Diarrheneae |
| Genus: | Diarrhena P.Beauv. |
| Type species | |
| Diarrhena americana | |
| Synonyms | |
| |
Diarrhena, or beakgrain, is a genus of Asian and North American plants in the grass family.
- Species
- Diarrhena americana P. Beauv. - east-central United States (OK MO AR IL IN OH KY TN AL GA NC VA WV MD PA)
- Diarrhena fauriei (Hack.) Ohwi - Shandong, Jilin, Heilongjiang, Liaoning, Japan, Korea, Primorye
- Diarrhena japonica Franch. & Sav. - Japan, Jeju-do, Kuril, Jilin, Heilongjiang, Liaoning
- Diarrhena mandshurica Maxim. - Jilin, Heilongjiang, Liaoning, Primorye, Amur, Khabarovsk, Korea, Hebei, Shanxi
- Diarrhena obovata (Gleason) Brandenburg - Ontario, east-central United States (TX OK KS NE SD MN IA MO AR IL WI MI IN OH KY TN VA WV PA NY)
- formerly included
see Ammophila Catabrosa Cutandia Sphenopus Vulpia
- Diarrhena aquatica - Catabrosa aquatica
- Diarrhena divaricata - Sphenopus divaricatus
- Diarrhena festucoides Raspail 1825 not (Raf.) Fernald 1932 - Cutandia divaricata
- Diarrhena littoralis - Ammophila arenaria subsp. australis
- Diarrhena maritima - Cutandia maritima
- Diarrhena setacea - Vulpia octoflora