Piptochaetium

{{Short description|Genus of plants}}

{{Automatic taxobox

|image = Piptochaetiumsp.jpg

|image_caption = Piptochaetium sp.

|display_parents = 3

|taxon = Piptochaetium

|authority = J.Presl

|type_species = Piptochaetium setifolium
(syn of P. panicoides)

|type_species_authority = J.Presl

|synonyms_ref = [http://www.tropicos.org/Name/40009315 Tropicos, Piptochaetium J. Presl ][http://apps.kew.org/wcsp/synonomy.do?name_id=434517 Kew World Checklist of Selected Plant Families]

|synonyms =

• Urachne subg. Piptochaetium (J. Presl) Trin. & Rupr.
• Podopogon Raf., rejected name
• Caryochloa Spreng. 1827, illegitimate homonym not Trin. 1826

}}

Piptochaetium, or speargrass,{{PLANTS|id=PIPTO|taxon=Piptochaetium|accessdate=6 October 2015}} is a genus of plants in the grass family, native to North and South America. Piptochaetium is a bunchgrass genus in the tribe Stipeae.Clayton, W. D., et al. (2006 onwards). [http://www.kew.org/data/grasses-db/www/gen00487.htm Piptochaetium.] GrassBase - The Online World Grass Flora.[https://www.biodiversitylibrary.org/page/390861#page/238/mode/1up Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: 222] in Latin[https://www.biodiversitylibrary.org/page/390861#page/238/mode/1up Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: plate XXXVII (37), figures 1-7 at left] line drawings ofMujica-Salles, J. & M. Marchi. 1993. Caracteres de valor taxonómico en el género Piptochaetium Presl (Poaceae-stipeae) y su relacion con la distribución de las especies brasileras. Candollea 48(1): 1–13Cialdella, A. M. & M. Arriaga. 1998. Revisión de las especies Sudamericanas del género Piptochaetium (Poaceae, Pooideae, Stipeae). Darwiniana 36(1–4): 107–157

Some of its species have been included in the genus Stipa by some authors.[https://www.biodiversitylibrary.org/page/27276395#page/315/mode/1up Cialdella, A. M. & L. M. Giussani. 2002. Phylogenetic relationships of the genus Piptochaetium (Poaceae, Pooideae, Stipeae): evidence from morphological data. Annals of the Missouri Botanical Garden 89(3): 305–336]Swallen, J. R. 1955. Gramineae. In: P. C. Standley & J. A. Steyermark (eds.), Flora of Guatemala—Part II. Fieldiana, Botany 24(2): i–ix, 1–390

; Species[https://plants.usda.gov/java/profile?symbol=PIPTO Piptochaetium, North American species.] USDA PLANTS Profile.[http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?9429 Piptochaetium.] Germplasm Resources Information Network.[http://bonap.net/NAPA/TaxonMaps/Genus/County/Piptochaetium Biota of North America Program 2013 county distribution maps]Skottsberg, C. 1951. A supplement to the pteridophytes and phanerogams of Juan Fernandez and Easter Island. 2(28): 763–792. In C. J. F. Skottsberg, Natural History of Juan Fernandez and Easter Island. Almquist & Wiksells, UppsalaGould, F. W. & R. Moran. 1981. The grasses of Baja California, Mexico. Memoir San Diego Society of Natural History 12: 1–140

• Piptochaetium alpinum - Santa Catarina, Rio Grande do Sul
• Piptochaetium angolense - Coquimbo
• Piptochaetium angustifolium - Coahuila, Tamaulipas, Nuevo León, México State
• Piptochaetium avenaceum — black oatgrass, blackseed needlegrass - United States (Texas to Florida north to Massachusetts + Michigan), Ontario, Tamaulipas, Nuevo León
• Piptochaetium avenacioides - Florida speargrass - Florida
• Piptochaetium bicolor - Rio Grande do Sul, Argentina, Uruguay, Chile incl Juan Fernández Islands
• Piptochaetium brachyspermum - Buenos Aires
• Piptochaetium brevicalyx - central + eastern Mexico
• Piptochaetium burkartianum - Corrientes
• Piptochaetium cabrerae - Buenos Aires
• Piptochaetium calvescens - Buenos Aires, Uruguay
• Piptochaetium confusum - Uruguay, Rio Grande do Sul, Entre Rios
• Piptochaetium cucullatum - Uruguay
• Piptochaetium featherstonei - Peru, Bolivia
• Piptochaetium fimbriatum - pinyon ricegrass - Arizona, Texas, New Mexico, Mexico, Guatemala
• Piptochaetium hackelii - Argentina, Uruguay
• Piptochaetium hirtum - Chile
• Piptochaetium indutum - Ecuador, Peru, Bolivia, Salta, Jujuy
• Piptochaetium jubatum - Uruguay
• Piptochaetium lasianthum - Uruguay, Argentina, Santa Catarina, Rio Grande do Sul
• Piptochaetium leiopodum - Buenos Aires, Uruguay
• Piptochaetium medium - Uruguay, Argentina, Brazil, Venezuela
• Piptochaetium montevidense - Uruguayan ricegrass - Argentina, Chile, Uruguay, Brazil, Paraguay, Bolivia, Peru, Ecuador, Venezuela
• Piptochaetium napostaense - Argentina
• Piptochaetium palustre - Santa Catarina
• Piptochaetium panicoides - Argentina, Chile, Uruguay, Brazil, Colombia, Bolivia, Peru, Ecuador, Venezuela
• Piptochaetium pringlei - Pringle's speargrass - Arizona, Texas, New Mexico, Mexico
• Piptochaetium ruprechtianum - Uruguay, Argentina, Brazil
• Piptochaetium sagasteguii - Peru
• Piptochaetium seleri - Mexico, Guatemala
• Piptochaetium setosum - bristly speargrass - Chile
• Piptochaetium stipoides - purple speargrass - Argentina, Chile, Uruguay, Brazil, Colombia; naturalized in Mexico, California
• Piptochaetium tovarii - Peru
• Piptochaetium uruguense - Argentina, Uruguay, Santa Catarina, Rio Grande do Sul, Paraguay, San Luis Potosí
• Piptochaetium virescens - Mexico, Guatemala

; formerly included

see Nassella Stipa

{{Columns-list|colwidth=30em|

• Piptochaetium collinum - Nassella laevissima
• Piptochaetium gibbum - Nassella gibba
• Piptochaetium laeve - Nassella pubiflora
• Piptochaetium laevissimum - Nassella laevissima
• Piptochaetium mexicanum - Nassella mexicana
• Piptochaetium mucronatum - Nassella mucronata
• Piptochaetium ovatum - Stipa ovata
• Piptochaetium trichotomum - Nassella trichotoma

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