Ortachne
Ortachne is a genus of Latin American plants in the grass family.
; SpeciesOrtachne breviseta Hitchc. - Chile, ArgentinaOrtachne rariflora Hughes - Chile, Argentina
; formerly included
see Aristida Ortachne floridana - Aristida floridanaOrtachne pilosa - Aristida jorullensisOrtachne scabra - Aristida ternipesOrtachne tenuis - Aristida ternipesOrtachne erectifolia Clayton - ''Lorenzochloa erectifolia''