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This species is accepted, and its native range is W. & Central U.S.A. to Mexico, N. Argentina.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Annual, or perennial; caespitose. Culms geniculately ascending, or decumbent; 5-30 cm long. Leaves mostly basal. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blades 1.5-7 cm long; 1-3(-4) mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes (2-)4-8(-9); borne along a central axis; unilateral; 1-3 cm long; bearing 25-40 fertile spikelets on each. Central inflorescence axis 2-12 cm long. Rhachis semiterete; smooth on surface, or scabrous on surface. Spikelet packing broadside to rhachis; crowded. Spikelets pectinate; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 2.5-3 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 2.5-3 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 2 mm long; 0.6-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex dentate; 2 -fid; acuminate; mucronate. Upper glume lanceolate; 2.5-3 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid; acuminate; mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2.5-3 mm long; coriaceous; keeled; 3 -veined. Lemma surface glabrous, or pubescent; hairy below. Lemma margins pubescent; hairy below. Lemma apex lobed; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn 0.5-3 mm long overall. Lateral lemma awns arising on inner edge of lobes, or on margin of lemma; 0.5-3 mm long; subequal to principal. Palea 2 -veined. Palea surface pubescent; hairy on flanks. Palea apex dentate; 4 -fid. Rhachilla extension pilose; hairy at tip. Apical sterile florets 2 in number; barren; cuneate; 0.5-1 mm long. Apical sterile lemmas lobed; 2 -fid; obtuse; awned; 3 -awned. Apical sterile lemma awns 0.5-3 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid; 1 mm long.
Distribution
North America: southwest USA, south-central USA, and Mexico. South America: southern South America.
Reference
Cynodonteae. Gould.

Native to:

Argentina Northeast, Argentina Northwest, Arizona, California, Colorado, Kansas, Mexico Northeast, Mexico Northwest, Mexico Southwest, Montana, Nevada, New Mexico, Oklahoma, Oregon, Texas, Utah

Introduced into:

Maryland

Bouteloua barbata Lag. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Hinton, G.B. [6439], Guerrero K000476016
Palmer, E. [189], Mexico Chondrosum barbatum K000309014
Bourgeau, E. [667], Mexico Chondrosum barbatum K000309016
Palmer, E. [751], Mexico Chondrosum barbatum K000309033
Mexico Chondrosum barbatum K000309017
Wright, C. [754], USA Chondrosum barbatum K000885844
Wright, C. [754], USA Chondrosum barbatum K000885842
Pringle, C.G. [s.n.], Mexico Chondrosum barbatum K000309015
Palmer, E. [508], Mexico Chondrosum barbatum K000885843
Moseley, H.N. [s.n.], Arizona Chondrosum barbatum K000885845

First published in Varied. Ci. 2(4): 141 (1805)

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 Chondrosum barbatum.]

Literature

Kew Backbone Distributions

  • 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.
  • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
  • 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. Missouri Botanical Garden.

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

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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