Ortachne
{{Short description|Genus of grasses}}
{{Automatic taxobox
|image = Flora Antarctica Plate CXXXI.jpg
|image_caption =Ortachne from Plate CXXXI of Hooker's Flora Anatarctica.
|display_parents = 3
|taxon = Ortachne
|type_species = Ortachne retorta
(syn of O. rariflora)
|type_species_authority = Nees ex Steud.[http://www.tropicos.org/Name/40033919 Tropicos, Ortachne Nees ex Steud.]
|synonyms_ref = [http://apps.kew.org/wcsp/synonomy.do?name_id=426534 Kew World Checklist of Selected Plant Families]
|synonyms = Parodiella Reeder & C.Reeder 1968, illegitimate homonym not Speg. 1880 (a fungus in Pyrenomycetes)[https://www.biodiversitylibrary.org/page/31359427#page/516/mode/1up Spegazzini, Carlo Luigi. 1880. Anales de la Sociedad Científica Argentina 9: 178][http://www.tropicos.org/Name/50161613 Tropicos, Parodiella Speg.]
}}
Ortachne is a genus of Latin American plants in the grass family.[https://www.biodiversitylibrary.org/page/345512#page/124/mode/1up Steudel, Ernst Gottlieb von. 1854. Synopsis Plantarum Glumacearum 1: 121] in LatinReeder, John Raymond & Reeder, Charlotte Olive. 1968. Boletín de la Sociedad Argentina de Botánica 12: 279f., f. 1A–B, D–F, 3[http://www.kew.org/data/grasses-db/www/gen00439.htm Grassbase - The World Online Grass Flora]
; Species[http://www.theplantlist.org/tpl1.1/search?q=Ortachne The Plant List search for Ortachne]Zuloaga, F. O., E. G. Nicora, Z. E. Rúgolo de Agrasar, O. Morrone, J. F. Pensiero & A. M. Cialdella. 1994. Catálogo de la familia Poaceae en la República Argentina. Monographs in systematic botany from the Missouri Botanical Garden 47: 1–178
- Ortachne breviseta Hitchc. - Chile, Argentina
- Ortachne rariflora (Hook.f.) Hughes - Chile, Argentina
see Aristida
- Ortachne floridana - Aristida floridana
- Ortachne pilosa - Aristida jorullensis
- Ortachne scabra - Aristida ternipes
- Ortachne tenuis - Aristida ternipes
- Ortachne erectifolia (Swallen) Clayton - Lorenzochloa erectifolia