[inaturalist.ca] Europe native: Ononis is a large genus of perennial herbs and shrubs from the legume family Fabaceae. The members of this genus are often called restharrows as some species grow as weeds on arable lands whose tough stems would stop the harrow. They are natively distributed in Europe. (link added by Mary Ann Machi)

[Cal-IPC] Invasive: Ononis alopecuroides (foxtail restharrow) is a woody annual (family Fabaceae) whose current distribution in California is limited to one location in San Luis Obispo County. This Mediterranean native prefers disturbed places, such as fields and pastures, as well as grasslands and oak woodlands. Although the one known population is almost completely eradicated, foxtail restharrow has the potential to be a highly aggressive invader, forming dense stands that exclude native plants. It is considered weedy in northern and central Europe. Cal-IPC Rating: Limited (link added by Mary Ann Machi)