[1] A systemic grass symbiont first described as Sphaeria typhina by Christian Hendrik Persoon in 1798, and transferred to genus Epichloë in 1865,[2] E. typhina forms an only partially resolved species complex within the Epichloë genus.

Epichloë typhina is found in Europe, but has been introduced widely in North America and elsewhere.

[3] It lives in association with a large number of grass species from multiple genera, including Anthoxanthum odoratum, Brachypodium phoenicoides, Brachypodium pinnatum, Dactylis glomerata, Lolium perenne, Milium effusum, Phleum pratense, Poa trivialis, Poa silvicola and Puccinellia distans.

Epichloë typhina appears to be seed-transmissible only in Puccinellia distans.

[4] It is found in Europe in the grass species Holcus lanatus.

[6] It is found in Argentina (Santa Cruz) on Bromus setifolius.

[7] It is found in the Canary Islands on Lolium edwardii.

This variety is seed-transmissible, but the sexual stage has not been observed.

[8] It is found in North America on Festuca arizonica.