1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus scribneri (Vasey) M.E.Jones

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

    [GB]
    Habit
    Perennial; caespitose. Culms decumbent; 15-40 cm long. Leaves mostly basal. Leaf-sheaths pubescent, or pilose; with reflexed hairs. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 0.5 mm long; entire, or erose. Leaf-blades involute; 4-7 cm long; 2-4 mm wide. Leaf-blade surface pubescent.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; sinuous; bilateral; 3-6 cm long. Rhachis tardily fragile at the nodes; flattened; smooth on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 3-5 mm long; falling with spikelet above. Rhachis internode tip not enlarged, or clavate (rarely); flat. Spikelets in pairs. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; scaberulous.
    Fertile
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; scaberulous.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 6-9 mm long; 1 length of upper glume; coriaceous; without keels; 2-5 -veined. Lower glume apex entire, or with a unilateral tooth; acute; awned; 1 -awned. Lower glume awn 10-15 mm long. Upper glume lanceolate; 6-9 mm long; coriaceous; without keels; 2-5 -veined. Upper glume apex entire, or with a unilateral tooth; acute; awned; 1 -awned. Upper glume awn 10-15 mm long.
    Florets
    Fertile lemma lanceolate to oblong; 7-8 mm long; coriaceous; 5 -veined. Lemma lateral veins obscure. Lemma surface smooth, or scaberulous. Lemma apex dentate; 1-2 -fid; with heterogeneous lobes; acute; awned; 1 -awned. Principal lemma awn from a sinus; spreading; 20-30 mm long overall. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 1.5-2 mm long. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: western Canada, northwest USA, southwest USA, and south-central USA.
    Reference
    Triticeae. Fl Pac NW 1994.

    Distribution

    Native to:

    Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Ontario, Oregon, Utah, Washington, Wyoming

    Elymus scribneri (Vasey) M.E.Jones appears in other Kew resources:

    First published in Contr. W. Bot. 14: 20 (1912)

    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.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    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