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  1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Species: Elymus glaucus Buckley
        1. Elymus glaucus subsp. mackenzii (Bush) J.J.N.Campb.

        This subspecies is accepted, and its native range is E. Central U.S.A.

    [GB]
    Habit
    Perennial; culms solitary. Culms slender; 90-120 cm long. Leaf-sheaths smooth. Ligule an eciliate membrane. Leaf-blades 10-20 cm long; 4-8 mm wide; light green. Leaf-blade surface pilose; densely hairy; hairy abaxially.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 8-20 cm long; 5 mm wide. Spikelet packing broadside to rhachis. Rhachis internodes linear. Rhachis internode tip flat. Spikelets solitary (or paired at base of raceme). Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1-3 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-20 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1-3 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-20 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume linear; 9 mm long; 1 length of upper glume; coriaceous; without keels; 5-7 -veined. Lower glume lateral veins prominent. Lower glume apex acute; awned; 1 -awned. Lower glume awn 6-8 mm long. Upper glume linear; 9 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 5-7 -veined. Upper glume lateral veins prominent. Upper glume apex acute; awned; 1 -awned. Upper glume awn 6-8 mm long.
    Florets
    Fertile lemma lanceolate; 9 mm long; coriaceous; 5 -veined. Lemma surface smooth, or scabrous; rough on veins. Lemma apex acute; awned; 1 -awned. Principal lemma awn 20-30 mm long overall. Palea 7-9 mm long. Apical sterile florets resembling fertile though underdeveloped.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: north-central USA and southeast .
    Reference
    Triticeae. Bush 2010.

    Distribution

    Native to:

    Arkansas, Missouri, Oklahoma

    Synonyms

    Other Data

    Elymus glaucus subsp. mackenzii (Bush) J.J.N.Campb. appears in other Kew resources:

    Bibliography

    First published in J. Kentucky Acad. Sci. 61: 93 (2000)

    Accepted by

    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.

    Not accepted by

    • Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew. [Cited as Elymus glaucus.]

    Literature

    Kew Backbone Distributions

    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. 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