1. Family: Poaceae Barnhart
    1. Genus: Muhlenbergia Schreb.
      1. Muhlenbergia porteri Scribn.

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

    [GB]
    Habit
    Perennial. Rootstock evident. Culms decumbent; slender; 30-100 cm long; wiry. Culm-internodes 1.5-6 cm long. Culm-nodes pubescent. Leaf-sheaths mostly shorter than adjacent culm internode. Ligule an eciliate membrane; 1-2(-2.5) mm long; lacerate. Leaf-blades flat, or involute; 2-5 cm long; 0.5-2 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate, or globose; effuse; 4-10 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 5-20 mm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; similar to fertile lemma in texture. Lower glume lanceolate; 2-3 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 2-3 mm long; 0.66-1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 3-4 mm long; membranous; keeled; 3 -veined. Lemma surface puberulous; hairy between veins. Lemma apex acute; awned; 1 -awned. Principal lemma awn flexuous; 5-10(-13) mm long overall. Palea 1 length of lemma; 2 -veined. Palea apex acuminate.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 1.7-2 mm long.
    Fruits
    Caryopsis with adherent pericarp; fusiform.
    Distribution
    North America: northwest USA, southwest USA, south-central USA, and Mexico.
    Reference
    Eragrostideae. Gould.

    Images

    Distribution

    Native to:

    Arizona, California, Colorado, Mexico Northeast, Mexico Northwest, Nevada, New Mexico, Oklahoma, Texas, Utah

    Muhlenbergia porteri Scribn. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Wright, C. [734], USA K000907326
    Bigelow, J.M. [104], USA K000907327
    Bigelow, J.M. [107], USA K000907328
    Bigelow, J.M. [105], USA K000907329

    First published in W.J.Beal, Grass. N. Amer. 2: 259 (1896)

    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

    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