1. Family: Poaceae Barnhart
    1. Genus: Muhlenbergia Schreb.
      1. Muhlenbergia pungens Thurb.

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated; scaly. Culms 20-50(-60) cm long. Ligule a ciliolate membrane; 0.5-1 mm long. Leaf-blades filiform; involute; 2-4 cm long; 1 mm wide; stiff. Leaf-blade apex pungent.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; effuse; 8-18 cm long. Primary panicle branches 3-5 in number. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 10-25 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; similar to fertile lemma in texture. Lower glume lanceolate; 1.5-2.5 mm long; 0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex erose; acute; awned; 1 -awned. Lower glume awn 0.5-1 mm long. Upper glume lanceolate; 1.7-3 mm long; 0.5-0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex erose; acute; mucronate, or awned; 1 -awned. Upper glume awn 0.5-1 mm long.
    Florets
    Fertile lemma lanceolate; 3-4 mm long; membranous; purple; keeled; 3 -veined. Lemma surface scaberulous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1-1.5(-2) mm long overall. Palea 1 length of lemma; 2 -veined. Palea apex with excurrent keel veins.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 2-2.5 mm long; purple.
    Fruits
    Caryopsis with adherent pericarp; fusiform.
    Distribution
    North America: northwest USA, north-central USA, southwest USA, and south-central USA.
    Reference
    Eragrostideae. Gould.

    Distribution

    Native to:

    Arizona, Colorado, Nebraska, New Mexico, South Dakota, Texas, Utah, Wyoming

    Muhlenbergia pungens Thurb. appears in other Kew resources:

    First published in Proc. Acad. Nat. Sci. Philadelphia 15: 78 (1863 publ. 1864)

    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.
    • 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
    • USDA, NRCS (2005- continuously updated). Natural Resources Conservation Services Plant Database http://plants.usda.gov/cgi_bin/topics.cgi?earl=checklist.html.
    • 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