Roegneria C. Koch was described by Koch in 1848 with Roegneria caucasica C. Koch, as type, Roegneria is the largest genus in the tribe Triticeae (Poaceae), including about 130 species in the world, widely distributed in the northwest, southwest and north of China. Some species of the genus are good pasturage, while some ones have characters of resistance to disease, drought, cold, and so on. It's the important resources for wheat and pasture breeding. However, morplological variations of Roegneria are compl...