1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus contractus Hitchc.

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

    [GB]
    Habit
    Perennial; caespitose. Culms erect; of moderate stature; 40-110 cm long; 2-3.5 mm diam. Culm-internodes eglandular, or glandular. Culm-nodes constricted; glabrous. Leaf-sheaths without keel; glabrous on surface; outer margin glabrous, or hairy. Ligule a fringe of hairs; 0.5-1 mm long. Collar pilose. Leaf-blades flat, or involute; 4-35 cm long; 3-8 mm wide. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle; embraced at base by subtending leaf. Panicle spiciform; linear; 15-50 cm long; 0.5-0.7 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.5-3.2 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.5-3.2 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; shorter than spikelet. Lower glume lanceolate; 1-2 mm long; 0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 2-2.7 mm long; 0.75-1 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 2.4-3.2 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea 0.9 length of lemma; 2 -veined. Palea keels approximate.
    Fruits
    Caryopsis with free soft pericarp; 1 mm long; light brown. Embryo 0.5 length of caryopsis.
    Distribution
    North America: northwest USA, southwest USA, south-central USA, and Mexico.
    Reference
    Eragrostideae. Gr Tex 1993.

    Distribution

    Native to:

    Arizona, California, Colorado, Connecticut, Maine, Mexico Northeast, Mexico Northwest, Michigan, New Jersey, New Mexico, New York, Oklahoma, Texas, Utah, Washington

    Sporobolus contractus Hitchc. appears in other Kew resources:

    First published in Amer. J. Bot. 2: 303 (1915)

    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 2020. 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 2020. 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