Hordeum murinum

Basic information
Scientific name	Hordeum murinum	Click to magnify
Common names	Wall barley grass, Wild Barley, Waybent
Higher taxon	Poaceae, Poales, Liliopsida, Magnoliophyta
Natural range	Europe.
Habitat	Crop field, some kind of farm area, grassland, urban area, vacancy.

Invasion information
Range in Japan	Almost entire Japan
Origin	Unknown.
Date	Recorded in Yokohama around 1870.
Route	Accidental: Vector unknown.
Impact	Competition with native species and crop plants. Host of insects and fungi. Native organism(s) affected: Native and crop plants.
Regulation in Japan	Import of Hordeum plants from the areas with Mayetiola destructor is prohibited by the Plant Protection Act of Japan.
Introduced range in other countries	Africa, Asia, Oceania, North and Latin America

Reference	Notes
Hokkaido (2011) Hokkaido Blue List (Accessed on 2011-11-08) http://bluelist.hokkaido-ies.go.jp/ (in Jpn) Shimizu (ed) (2003) Naturalized Plants of Japan. Heibonsha, Tokyo (in Jpn) The Plant Protection Act. (Accessed on 2011-11-08) http://www.pps.go.jp/law_active/Notification/basis/4/12/html/12.html (in Jpn) etc.	Sometimes used as a genetic resource for breed improvement of barley.