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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Poaceae
Subfamilia: Pooideae
Tribus: Stipeae
Genus: Piptochaetium
Species: P. alpinum – P. angolense – P. angustifolium – P. avenaceum – P. avenacioides – P. bicolor – P. brachyspermum – P. brevicalyx – P. burkartianum – P. cabrerae – P. calvescens – P. confusum – P. cucullatum – P. featherstonei – P. fimbriatum – P. fuscum – P. grisebachii – P. hackelii – P. hirtum – P. indutum – P. jubatum – P. lasianthum – P. leiopodum – P. medium – P. mexicanum – P. montevidense – P. napostaense – P. palustre – P. panicoides – P. pringlei – P. ruprechtianum – P. sagasteguii – P. seleri – P. setosum – P. stipoides – P. tovarii – P. uruguense – P. virescens
Name

Piptochaetium J.Presl in C.B.Presl, Reliq. Haenk. 1: 222 (1830), nom. cons.
Type species: Piptochaetium panicoides (Lam.) É.Desv. in C.Gay, Fl. Chil. 6: 270 (1854)

Synonyms

Heterotypic
Podopogon Raf., Neogenyton: 4 (1825), nom. inval.
Caryochloa Spreng., Syst. Veg. 4(2): 22 (1827), nom. illeg.

References

Barkworth, M.E.; Cialdella, A.M.; Gandhi, K. 2014: Piptochaetium fuscum (Nees ex Steud.) Barkworth, Ciald., & Gandhi, a new combination replacing Piptochaetium setosum (Trin.) Arechav. PhytoKeys, 35: 17–22. DOI: 10.3897/phytokeys.35.6622 Reference page.
Presl, J.S. (1830) Reliquiae Haenkeanae 1: 222.
Barber, J.C., Hames, K.A., Cialdella, A.M., Giussani, L. & Morrone, O. (2009) Phylogenetic relationships of Piptochaetium Presl (Poaceae: Stipeae) and related genera reconstructed from nuclear and chloroplast sequence datasets, Taxon, 58 (2): 375–380.
Govaerts, R. et al. 2013. Piptochaetium in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2013 Dec. 17. Reference page.
Simon, B.K., Clayton, W.D., Harman, K.T., Vorontsova, M., Brake, I., Healy, D. & Alfonso, Y. 2013. GrassWorld, Piptochaetium. Published on the internet. Accessed: 2013 Dec. 17.
Tropicos.org 2013. Piptochaetium. Missouri Botanical Garden. Published on the internet. Accessed: 2013 Dec. 17.
International Plant Names Index. 2013. Piptochaetium. Published online. Accessed: 17 Dec. 2013.

Piptochaetium, or speargrass,[3] is a genus of New World plants in the grass family, native to North and South America. Piptochaetium is a bunchgrass genus in the tribe Stipeae.[4][5][6][7][8]

Some of its species have been included in the genus Stipa by some authors.[9][10]

Species[2][11][12][13][14][15]

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[2]

see Nassella Stipa

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

References

Tropicos, Piptochaetium J. Presl
Kew World Checklist of Selected Plant Families
USDA, NRCS (n.d.). "Piptochaetium". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 6 October 2015.
Clayton, W. D., et al. (2006 onwards). Piptochaetium. GrassBase - The Online World Grass Flora.
Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: 222 in Latin
Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: plate XXXVII (37), figures 1-7 at left line drawings of
Mujica-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): 1–13
Cialdella, A. M. & M. Arriaga. 1998. Revisión de las especies Sudamericanas del género Piptochaetium (Poaceae, Pooideae, Stipeae). Darwiniana 36(1–4): 107–157
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
Piptochaetium, North American species. USDA PLANTS Profile.
Piptochaetium. Germplasm Resources Information Network.
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, Uppsala
Gould, F. W. & R. Moran. 1981. The grasses of Baja California, Mexico. Memoir San Diego Society of Natural History 12: 1–140

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