Calamtrisetum

{{Short description|Genus of grasses}}

{{Speciesbox

|genus = Calamtrisetum

|parent_authority = Charit.

|species = tenuis

|authority = Charit.

}}

Calamtrisetum is a genus of grasses. It contains a single species, Calamtrisetum tenuis, a perennial native to western Siberia. Both genus and species were described in 2011 by Boris Stepanovich Charitontcev.{{cite web |title=Calamtrisetum tenuis Charit. |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77320144-1 |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |access-date=29 May 2025}}