[Cal-IPC] Invasive: Hordeum murinum (hare barley or foxtail) is an annual grass with long awns (family Poaceae). Hare barley may have arrived in California with Spanish settlers and is more common than Mediterranean barley in disturbed, dry upland areas. Cal-IPC Rating: Moderate (link added by Mary Ann Machi)

[Wikipedia] Mediterranean, Central Europe, Western Asia, North Africa native: Hordeum murinum complex is the most widespread of all the other Hordeum species.[3] The center of distribution of H. murinum is in the Mediterranean area, Central Europe, Western Asia, and North Africa. (link added by Mary Ann Machi)