1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus flexuosus (Vasey) Rydb.

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

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 35-120 cm long. Leaf-sheaths without keel. Leaf-sheath oral hairs ciliate; 1-1.5 mm long. Ligule a fringe of hairs. Leaf-blades 8-25 cm long; 2-5 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong; effuse; nodding; 10-30 cm long; 4-9 cm wide. Primary panicle branches spreading, or reflexed; branching divaricately. Panicle branches flexuous; pubescent in axils. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 1.9-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 1.9-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; reaching apex of florets. Lower glume ovate; 1-1.3 mm long; 0.5 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1.9-2.5 mm long; 1 length of adjacent fertile lemma; membranous; grey; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 1.9-2.5 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea 2 -veined. Palea keels approximate.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with free soft pericarp; 1 mm long.
    Distribution
    North America: southwest USA, south-central USA, and Mexico.
    Reference
    Eragrostideae. Gr Tex 1993.

    Distribution

    Native to:

    Arizona, California, Colorado, Kansas, Mexico Northeast, Mexico Northwest, Montana, New Mexico, Texas, Utah

    Sporobolus flexuosus (Vasey) Rydb. appears in other Kew resources:

    First published in Bull. Torrey Bot. Club 32: 601 (1905)

    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.
    • 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
    • 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

    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