Cinnastrum

{{Short description|Genus of grasses}}

{{Speciesbox

|genus = Cinnastrum

|authority = E.Fourn.

|species = poiforme

|parent_authority = (Kunth) E.Fourn.

|synonyms={{collapsible list|bullets=true

|title=Synonymy

|Agrostis poiformis {{small|Willd. ex Steud. (1840), pro syn.}}

|Arundo pooides {{small|Poir. (1816)}}

|Calamagrostis poiformis {{small|(Kunth) Beal (1896)}}

|Calamagrostis pooides {{small|Trin. ex Steud. (1840), pro syn.}}

|Calamovilfa poiformis {{small|(Kunth) M.E.Jones (1912)}}

|Cinna miliacea {{small|Griseb. ex E.Fourn. (1886), pro syn.}}

|Cinna poiformis {{small|(Kunth) Scribn. & Merr. (1901)}}

|Cinnastrum miliaceum {{small|E.Fourn. (1886)}}

|Deyeuxia poiformis {{small|Kunth (1816)}} (basionym)

|Poa subnudiflora Kunth {{small|(1829), nom. superfl.}}

|Poa subuniflora Kunth {{small|(1829)}}

}}

|synonyms_ref = {{cite web |title=Cinnastrum poiforme (Kunth) E.Fourn. |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:58874-2 |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |access-date=14 May 2025}}

}}

Cinnastrum is a genus of grasses. It includes a single species, Cinnastrum poiforme, a perennial which ranges from northeastern Mexico to Guatemala and from Costa Rica to Venezuela and Bolivia. In Colombia it grows in the Andes at high elevations (3000 to 4000 meters).