(Trisetum rigidum)
Trisetum rigidum is a grass species first described by Friedrich August Marschall von Bieberstein , and became known as Johann Jakob Roemer and Schult. . Trisetum rigidum is part of the genus Glanshavnen , and the family grass Trisetum is a genus of plants in the grass family, widespread in temperate, subarctic, and alpine habitats in much of the worl.Oatgrass is a common name for plants in this genus.