Trisetum is a genus of plants in the grass family, widespread in temperate, subarctic, and alpine habitats in much of the world.Persoon, Christiaan Hendrik. 1805. Synopsis Plantarum 1: 97-98 in LatinGrassbase - The World Online Grass FloraFlora of China Vol. 22 Page 325 三毛草属 san mao cao shu Trisetum Persoon, Syn. Pl. 1: 97. 1805. Altervista Flora Italiana genere Trisetum includes photos, drawings, and distribution maps for several speciesAtlas of Living Australia 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.Barberá, P., Soreng, R.J., Peterson, P.M., Garcia-Porta, J., Romaschenko, K., Aedo, C. and Quintanar, A. (2025), Phylogenetics and reticulation among koelerioid clades, part I: Contraction of Trisetum, expansion of Acrospelion, Graphephorum, and Tzveleviochloa; Graciliotrisetum gen. nov. and resurrection of Aegialina (Poaceae, Pooideae, Poeae, Aveninae). Journal of Systematics and Evolution, 63: 629-655. https://doi.org/10.1111/jse.13133 Plants of the World Online currently accepts eight species. Trisetum bertolonii – Italy (Apennines) Trisetum caudulatum – Juan Fernández Islands, Chile, and southern Argentina Trisetum clarkei – Afghanistan, Himalayas, Xinjiang, and western and central China Trisetum debile – China (northwestern Yunnan) Trisetum flavescens – Europe, Azores, northwestern Africa, and western Asia Trisetum glomeratum – Hawaiian Islands Trisetum macbridei – central Peru Trisetum yunnanense – China (Yunnan)
The List of Trisetum species includes species accepted as of 2012.Grass Manual Treatment
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