1. Family: Poaceae Barnhart
    1. Genus: Setaria P.Beauv.
      1. Setaria leucopila (Scribn. & Merr.) K.Schum.

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

    [GB]
    Habit
    Perennial; caespitose. Culms erect, or geniculately ascending; 20-100 cm long. Culm-internodes elliptical in section; distally glabrous, or pubescent. Lateral branches lacking, or sparse. Leaf-sheaths keeled; glabrous on surface; outer margin hairy. Ligule a fringe of hairs; 1-2.5 mm long. Collar glabrous, or pubescent, or pilose. Leaf-blades flat, or conduplicate; 8-25 cm long; 2-5 mm wide. Leaf-blade surface scabrous; rough adaxially, or on both sides. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear; continuous, or interrupted; dense; tapering above; 8-15 cm long; 1-1.5 cm wide. Primary panicle branches sterile at the tips. Panicle axis angular; scabrous; glabrous, or villous. Spikelets subtended by an involucre. Fertile spikelets pedicelled; 1 in the cluster. Involucre composed of bristles; 4-15 mm long. Involucral bristles persistent; 1 per spikelet; flexible; antrorsely scaberulous; glabrous. Pedicels oblong.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.2-2.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.2-2.5 mm long; falling entire.
    Glume
    Glumes shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume apex acute. Upper glume ovate; 0.75-1 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 5 -veined; acute. Palea of lower sterile floret 0.5-0.75 length of lemma. Fertile lemma ovate; dorsally compressed; gibbous; 2.2-2.5 mm long; indurate; without keel. Lemma surface rugulose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate.
    Distribution
    North America: northwest USA, southwest USA, south-central USA, and Mexico. South America: southern South America.
    Reference
    Paniceae. Rominger 1994.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Arkansas, Colorado, Florida, Mexico Central, Mexico Northeast, Mexico Northwest, New Mexico, Oklahoma, Texas

    Setaria leucopila (Scribn. & Merr.) K.Schum. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Palmer, E. [1363], Coahuila K000643182

    First published in Just's Bot. Jahresber. 28(1): 417 (1902)

    Accepted by

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

    Literature

    Kew Backbone Distributions
    • 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.
    • 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