Piptochaetium

Piptochaetium, or speargrass,^[3] is a genus of 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]}

Piptochaetium
Piptochaetium sp.
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Poaceae
Subfamily:	Pooideae
Supertribe:	Stipodae
Tribe:	Stipeae
Genus:	Piptochaetium J.Presl
Type species
Piptochaetium setifolium (syn of P. panicoides) J.Presl
Synonyms[1][2]
Urachne subg. Piptochaetium (J. Presl) Trin. & Rupr. Podopogon Raf., rejected name Caryochloa Spreng. 1827, illegitimate homonym not Trin. 1826

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

1. Tropicos, Piptochaetium J. Presl
2. Kew World Checklist of Selected Plant Families
3. NRCS. "Piptochaetium". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 6 October 2015.
4. Clayton, W. D., et al. (2006 onwards). Piptochaetium. GrassBase - The Online World Grass Flora.
5. Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: 222 in Latin
6. Presl, Jan Svatopluk. 1830. Reliquiae Haenkeanae 1: plate XXXVII (37), figures 1-7 at left line drawings of
7. 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
8. Cialdella, A. M. & M. Arriaga. 1998. Revisión de las especies Sudamericanas del género Piptochaetium (Poaceae, Pooideae, Stipeae). Darwiniana 36(1–4): 107–157
9. 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
10. 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
11. Piptochaetium, North American species. USDA PLANTS Profile.
12. Piptochaetium. Germplasm Resources Information Network.
13. Biota of North America Program 2013 county distribution maps
14. 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
15. Gould, F. W. & R. Moran. 1981. The grasses of Baja California, Mexico. Memoir San Diego Society of Natural History 12: 1–140

External links

Media related to Piptochaetium at Wikimedia Commons