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This species is accepted, and its native range is S. Central U.S.A. to Mexico, Argentina.
Nassella tenuissima

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 25-70 cm long. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths scaberulous; glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 1.5-4 mm long; obtuse. Leaf-blades aciculate; 7-40 cm long; 0.4-0.5 mm wide. Leaf-blade surface scaberulous; rough on both sides; glabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; embraced at base by subtending leaf. Panicle open; linear; equilateral; 10-25 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5-10.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.2-0.4 mm long; pilose; obtuse. Floret callus hairs 0.25-0.33 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5-10.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.2-0.4 mm long; pilose; obtuse. Floret callus hairs 0.25-0.33 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 5-10.5 mm long; 1.1-1.3 length of upper glume; hyaline; pallid, or purple; without keels; 3 -veined. Lower glume lateral veins obscure. Lower glume apex attenuate. Upper glume lanceolate; 5-10.5 mm long; 3-4 length of adjacent fertile lemma; hyaline; pallid, or purple; without keels; 3 -veined. Upper glume lateral veins obscure. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; laterally compressed; 1.8-3.6 mm long; coriaceous; without keel; 5 -veined. Lemma surface asperulous; rough above; glabrous. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; with this appendage 0.2-0.3 mm long; awned; 1 -awned. Principal lemma awn geniculate, or bigeniculate; 50-90 mm long overall; with a straight or slightly twisted column. Column of lemma awn glabrous. Palea 0.5-1 mm long; 0 -veined; without keels.
Morphology Reproductive morphology Flowers
Lodicules 2, or 3. Anthers 3; 1.2-1.5 mm long; anther tip penicillate. Stigmas 2. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; linear; 1.5-2 mm long; dark brown. Hilum linear; 0.5-0.66 length of caryopsis.
Distribution
Africa: south. Australasia: Australia and New Zealand. North America: south-central USA and Mexico. South America: southern South America.
Reference
Stipeae. Torres 1994.

[UNAL]

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia. http://www.biovirtual.unal.edu.co/nombrescomunes/

Vernacular
avenilla

[CPLC]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Cultivada en Colombia; Alt. 1500 - 3000 m.; Andes.
Morphology General Habit
Hierba

Native to:

Argentina Northeast, Argentina Northwest, Argentina South, Colorado, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southwest, New Mexico, Texas

Extinct in:

Tasmania

Introduced into:

Austria, California, Cape Provinces, Colombia, Italy, New South Wales, New Zealand North, New Zealand South, Spain, Switzerland, Tasmania, Victoria

Nassella tenuissima (Trin.) Barkworth appears in other Kew resources:

First published in Taxon 39: 612 (1990)

Accepted by

  • (2019). https://doi.org/10.2436/20.1502.01.18 epublication.
  • Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
  • Cialdella, A.M., Muñoz-Schick, M. & Morrone, O. (2013). Sinopsis de las especies Austro-Americanas del género Nassella (Poaceae, Pooideae, Stipeae) Darwiniana, n.s., 1: 76-161.
  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
  • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
  • Sclovich, S.E., Giussani, L.M., Ciadella, A.M. & Sede, S.M. (2015). Phylogenetic analysis of Jarava (Poaceae, Pooideae, Stipeae) and related genera: testing the value of the awn indumendum in the circumscription of Jarava Plant Systematics and Evolution 301: 1625-1641.
  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
  • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.

Not accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Stipa tenuissima.]

Literature

Catálogo de Plantas y Líquenes de Colombia

  • ColPlantA (2021). "ColPlantA. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://www.colplanta.org/"

Kew Backbone Distributions

  • (2019). https://doi.org/10.2436/20.1502.01.18 epublication.
  • Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Edgar, E & Connor, H.E. (2010). Flora of New Zealand, ed. 2, 5: 1-650. R.E.Owen, Government Printer, Wellington.
  • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
  • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
  • Wilson, A. (ed.) (2009). Flora of Australia 44A: 1-410. Australian Government Publishing Service, Canberra.
  • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.

Catálogo de Plantas y Líquenes de Colombia
http://creativecommons.org/licenses/by-nc-sa/3.0

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Universidad Nacional de Colombia
ColPlantA database
http://creativecommons.org/licenses/by-nc-sa/3.0