Trisetum is a genus of plants in the grass family, widespread in temperate, subarctic, and alpine habitats in much of the world. Oatgrass is a common name for plants in this genus.
Species
Trisetum formerly included over 70 species. Over the past decade the genus has been split into smaller genera (including Graciliotrisetum and Sibirotrisetum) and some species placed in other genera. Plants of the World Online currently accepts eight species.
Trisetum bertolonii Jonsell – Italy (Apennines)
Trisetum caudulatum Trin. – Juan Fernández Islands, Chile, and southern Argentina
Trisetum clarkei (Hook.f.) R.R.Stewart – Afghanistan, Himalayas, Xinjiang, and western and central China
Trisetum debile Chrtek – China (northwestern Yunnan)
Trisetum flavescens (L.) P.Beauv. – Europe, Azores, northwestern Africa, and western Asia
Trisetum glomeratum (Kunth) Trin. ex Steud. – Hawaiian Islands
Trisetum macbridei Hitchc. – central Peru
Trisetum yunnanense Chrtek – China (Yunnan)
The List of Trisetum species includes species accepted as of 2012.
