| Argentina | | | Soreng, R. J., J. Valdés-Reyna & A. M. Cialdella | 2002 | Stipeae | Internet Cat. New World Grasses | ined. |
| Argentina | | | Barkworth, M.E. & A. M. Torres | 2001 | Distribution and diagnostic characters of Nassella (Poaceae: Stipeae) | Taxon | 50(2): 439–468 |
| Argentina | | | Soreng, R. J. | 2003 | Nassella. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 455–467 |
| Argentina | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| Argentina | Jujuy | | Torres, A. M. | 1997 | Nassella (Gramineae) del noroeste de la Argentina | Comis. Invest. Ci. [Buenos Aires] | 13: 5–45 |
| Argentina | Salta | | Torres, A. M. | 1997 | Nassella (Gramineae) del noroeste de la Argentina | Comis. Invest. Ci. [Buenos Aires] | 13: 5–45 |
| Argentina | Tucumán | | Torres, A. M. | 1997 | Nassella (Gramineae) del noroeste de la Argentina | Comis. Invest. Ci. [Buenos Aires] | 13: 5–45 |
| Bolivia | | | Barkworth, M.E. & A. M. Torres | 2001 | Distribution and diagnostic characters of Nassella (Poaceae: Stipeae) | Taxon | 50(2): 439–468 |
| Bolivia | | | Soreng, R. J., J. Valdés-Reyna & A. M. Cialdella | 2002 | Stipeae | Internet Cat. New World Grasses | ined. |
| Bolivia | | | Soreng, R. J. | 2003 | Nassella. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 455–467 |
| Bolivia | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| Bolivia | | | Jørgensen, P. M., M. H. Nee & S. G. Beck | 2014 | Catálogo de las plantas vasculares de Bolivia | Cat. Pl. Vasc. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. | 127(1–2): i–viii, 1–1744 |
| Bolivia | | | Jørgensen, P. M., M. H. Nee, S. G. Beck & A.F. Fuentes | 2015 en adelante | Catalogo de las plantas vasculares de Bolivia (actualizaciones en línea) | | |
| Peru | | | Soreng, R. J., G. Davidse, P. M. Peterson, F. O. Zuloaga, E. J. Judziewicz, T. S. Filgueiras & O. Morrone | 2003 and onwards | On-line taxonomic novelties and updates, distributional additions and corrections, and editorial changes since the four published volumes of the Catalogue of New World Grasses (Poaceae) published in Contr. U.S. Natl. Herb. vols. 39, 41, 46, and 48 | Internet Cat. New World Grasses | http://www.tropicos.org/Project/CNWG: |
| Peru | | | Barkworth, M.E. & A. M. Torres | 2001 | Distribution and diagnostic characters of Nassella (Poaceae: Stipeae) | Taxon | 50(2): 439–468 |
| Peru | | | Soreng, R. J., J. Valdés-Reyna & A. M. Cialdella | 2002 | Stipeae | Internet Cat. New World Grasses | ined. |
| Peru | | | Soreng, R. J. | 2003 | Nassella. | Catalogue of New World Grasses (Poaceae): IV. Subfamily Pooideae, Contr. U.S. Natl. Herb. | 48: 455–467 |