What is "diarrhena"

Diarrhena (beakgrain) is a genus of Asian and North American plants in the grass family.

1. Diarrhena americana P. Beauv. - east-central United States ( OK MO AR IL IN OH KY TN AL GA NC VA WV MD PA)
2. Diarrhena fauriei (Hack.) Ohwi - Shandong, Jilin, Heilongjiang, Liaoning, Japan, Korea, Primorye
3. Diarrhena japonica Franch. & Sav. - Japan, Jeju-do, Kuril, Jilin, Heilongjiang, Liaoning
4. Diarrhena mandshurica Maxim. - Jilin, Heilongjiang, Liaoning, Primorye, Amur, Khabarovsk, Korea, Hebei, Shanxi
5. 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)

see Ammophila Catabrosa Cutandia Sphenopus Vulpia