1. Family: Poaceae Barnhart
    1. Genus: Bouteloua Lag.
      1. Bouteloua gracilis (Kunth) Lag. ex Griffiths

        This species is accepted, and its native range is W. & Central Canada to Mexico.

    [GB]
    Habit
    Perennial; caespitose. Culms erect, or decumbent; 25-60 cm long. Culm-nodes glabrous, or pubescent. Ligule a fringe of hairs. Leaf-blades 5-10 cm long; 1-2.5 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1-3(-4); single, or borne along a central axis; spreading; arcuate; unilateral; 1.5-5 cm long. Central inflorescence axis 2-5 cm long; tip without extension, or subulate. Rhachis semiterete; scabrous on surface. Spikelet packing broadside to rhachis; crowded. Spikelets pectinate; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Fertile
    Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Glume
    Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 3-3.5 mm long; 0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scabrous; eciliate, or ciliate. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 5-6 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein smooth to scabrous; eciliate to ciliate. Upper glume lateral veins absent. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma oblong; 4-6 mm long; coriaceous; keeled; 3 -veined. Lemma surface pubescent. Lemma apex lobed; 3 -fid; with outer lobes shorter and with central lobe bidentate; incised 0.3 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; 1-3 mm long overall. Lateral lemma awns arising on inner edge of lobes; 0.5-2 mm long; shorter than principal. Palea 2 -veined. Palea keels ciliolate. Palea apex with excurrent keel veins. Rhachilla extension pubescent; hairy at tip. Apical sterile florets 1(-2) in number; barren; cuneate; 0.4 mm long. Apical sterile lemmas lobed; 2 -fid; obtuse; awned; 3 -awned. Apical sterile lemma awns 2-3 mm long.
    Fruits
    Caryopsis with adherent pericarp; 2.5-3 mm long. Embryo 0.75 length of caryopsis.
    Distribution
    North America: western Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico.
    Reference
    Cynodonteae. Gould.

    Images

    Distribution

    Native to:

    Alberta, Arizona, British Columbia, California, Colorado, Idaho, Illinois, Iowa, Kansas, Manitoba, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southwest, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Ohio, Oklahoma, Ontario, Saskatchewan, South Dakota, Texas, Utah, Wisconsin, Wyoming

    Introduced into:

    Bangladesh, China North-Central, China Southeast, Connecticut, Florida, Maine, Masachusettes, New York, Saudi Arabia, South Carolina

    Bouteloua gracilis (Kunth) Lag. ex Griffiths appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Pringle, C.G. [407], Mexico Chondrosum gracile K000309012

    First published in Contr. U.S. Natl. Herb. 14: 375 (1912)

    Accepted by

    • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.

    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 gracile.]

    Literature

    Kew Backbone Distributions
    • Mostaph, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh.
    • Cope, T.A., Knees, S.G. & Miller, A.G. (2007). Flora of the Arabian peninsula and Socotra 5(1): 1-387. Edinburgh University 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.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    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 2018. 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 2018. 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