Piptochaetium
Piptochaetium, or speargrass, is a genus of plants in the grass family, native to North and South America. Piptochaetium is a bunchgrass genus in the tribe Stipeae.
Some of its species have been included in the genus Stipa by some authors.
; SpeciesPiptochaetium alpinum - Santa Catarina, Rio Grande do SulPiptochaetium angolense - CoquimboPiptochaetium angustifolium - Coahuila, Tamaulipas, Nuevo León, México StatePiptochaetium avenaceum — black oatgrass, blackseed needlegrass - United States, Ontario, Tamaulipas, Nuevo LeónPiptochaetium avenacioides - Florida speargrass - Florida Piptochaetium bicolor - Rio Grande do Sul, Argentina, Uruguay, Chile incl Juan Fernández IslandsPiptochaetium brachyspermum - Buenos AiresPiptochaetium brevicalyx - central + eastern MexicoPiptochaetium burkartianum - CorrientesPiptochaetium cabrerae - Buenos AiresPiptochaetium calvescens - Buenos Aires, UruguayPiptochaetium confusum - Uruguay, Rio Grande do Sul, Entre RiosPiptochaetium cucullatum - UruguayPiptochaetium featherstonei - Peru, BoliviaPiptochaetium fimbriatum - pinyon ricegrass - Arizona, Texas, New Mexico, Mexico, GuatemalaPiptochaetium hackelii - Argentina, UruguayPiptochaetium hirtum - ChilePiptochaetium indutum - Ecuador, Peru, Bolivia, Salta, JujuyPiptochaetium jubatum - UruguayPiptochaetium lasianthum - Uruguay, Argentina, Santa Catarina, Rio Grande do SulPiptochaetium leiopodum - Buenos Aires, UruguayPiptochaetium medium - Uruguay, Argentina, Brazil, VenezuelaPiptochaetium montevidense - Uruguayan ricegrass - Argentina, Chile, Uruguay, Brazil, Paraguay, Bolivia, Peru, Ecuador, VenezuelaPiptochaetium napostaense - ArgentinaPiptochaetium palustre - Santa CatarinaPiptochaetium panicoides - Argentina, Chile, Uruguay, Brazil, Colombia, Bolivia, Peru, Ecuador, VenezuelaPiptochaetium pringlei - Pringle's speargrass - Arizona, Texas, New Mexico, MexicoPiptochaetium ruprechtianum - Uruguay, Argentina, BrazilPiptochaetium sagasteguii - PeruPiptochaetium seleri - Mexico, GuatemalaPiptochaetium setosum - bristly speargrass - ChilePiptochaetium stipoides - purple speargrass - Argentina, Chile, Uruguay, Brazil, Colombia; naturalized in Mexico, CaliforniaPiptochaetium tovarii - PeruPiptochaetium uruguense - Argentina, Uruguay, Santa Catarina, Rio Grande do Sul, Paraguay, San Luis PotosíPiptochaetium virescens - Mexico, Guatemala
; formerly included
see ''Nassella Stipa''