1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus smithii (Rydb.) Gould

        This species is accepted, and its native range is N. America to NE. Mexico.

    [GB]
    Habit
    Perennial; culms solitary, or caespitose. Rhizomes elongated. Culms 30-90 cm long. Leaf-sheaths glabrous on surface, or puberulous; outer margin glabrous, or hairy. Leaf-sheath auricles absent, or falcate. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades involute; 2-7 mm wide; stiff; glaucous. Leaf-blade surface smooth, or scabrous; rough adaxially; glabrous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 6-20 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; 0.5 their length apart. Rhachis internodes linear; 7-10 mm long. Spikelets appressed; solitary, or in pairs. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 5-12 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes scaberulous.
    Fertile
    Spikelets comprising 5-12 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes scaberulous.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 10-12 mm long; 1 length of upper glume; coriaceous; without keels; 3-7 -veined. Lower glume apex setaceously attenuate. Upper glume lanceolate; 10-12 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 5-7 -veined. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma lanceolate to oblong; 10 mm long; coriaceous; 5-7 -veined. Lemma lateral veins obscure. Lemma surface glabrous, or pubescent; hairy at base. Lemma margins eciliate, or pubescent. Lemma apex acuminate; mucronate. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and southeast USA.
    Reference
    Triticeae. Gr Tex 1993.

    Distribution

    Native to:

    Alaska, Alberta, Arizona, British Columbia, California, Colorado, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Manitoba, Masachusettes, Mexico Northeast, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Mexico, New York, North Dakota, Ohio, Oklahoma, Ontario, Oregon, Québec, Saskatchewan, South Dakota, Tennessee, Texas, Utah, Washington, Wisconsin, Wyoming

    Elymus smithii (Rydb.) Gould appears in other Kew resources:

    First published in Madroño 9: 127 (1947)

    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.

    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.
    • 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.

    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