1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus triticoides (Buckley) Pilg.

        This species is accepted, and its native range is W. Canada to N. Mexico.

    [GB]
    Habit
    Perennial; culms solitary. Rhizomes elongated; scaly. Culms erect; 40-120 cm long. Culm-internodes glaucous; distally glabrous. Leaf-sheaths glabrous on surface, or pubescent. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades flat, or involute; 3-6 mm wide; coriaceous; stiff; glaucous. Leaf-blade surface ribbed; glabrous, or pubescent.
    Inflorescences
    Inflorescence composed of racemes. Peduncle glabrous, or pubescent above. Racemes 1; single; bilateral; 6-20 cm long. Spikelet packing broadside to rhachis. Rhachis internodes linear. Spikelets appressed; in pairs. Fertile spikelets sessile; 2 in the cluster.
    Spikelets
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet, or reaching apex of florets, or exceeding apex of florets. Lower glume subulate; 5-15 mm long; coriaceous; 1 -veined. Lower glume lateral veins absent. Upper glume subulate; 5-15 mm long; coriaceous; 1 -veined. Upper glume lateral veins absent.
    Florets
    Fertile lemma lanceolate; 6-10 mm long; coriaceous; without keel; 5 -veined. Lemma apex acute; muticous, or mucronate. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Distribution
    North America: northwest USA, southwest USA, south-central USA, and Mexico.
    Reference
    Triticeae. Gr Tex 1993.
    [GB]
    Habit
    Perennial; culms solitary. Rhizomes elongated. Culms erect; 15-75 cm long; 1-2.5 mm diam. Culm-internodes distally glabrous, or pubescent. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs ciliate; 1-2 mm long. Leaf-sheath auricles absent, or falcate; 0.4-0.8 mm long. Ligule an eciliate membrane; 0.3-0.5 mm long; erose; truncate. Leaf-blades 4-29 cm long; 1-2(-5) mm wide; coriaceous; stiff. Leaf-blade venation with 6-10 secondary veins. Leaf-blade surface ribbed; scabrous; rough adaxially; pilose; sparsely hairy.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 1.5-27 cm long; 4-15 mm wide. Rhachis glabrous on surface, or puberulous on surface; ciliate on margins. Rhachis hairs 0.5-1 mm long. Spikelet packing broadside to rhachis. Rhachis internodes linear; 7-20 mm long. Spikelets appressed; solitary (or paired at base of raceme). Fertile spikelets pedicelled. Pedicels 1-2(-5) mm long.
    Spikelets
    Spikelets comprising 3-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 16-25 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 3-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 16-25 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 8-12 mm long; 1 length of upper glume; coriaceous; 1-keeled; 0-1(-3) -veined. Lower glume lateral veins absent, or obscure. Upper glume lanceolate; 8-12 mm long; coriaceous; 1-keeled; 0-1(-3) -veined. Upper glume primary vein absent, or obscure. Upper glume lateral veins absent, or obscure.
    Florets
    Fertile lemma lanceolate; 7-12 mm long; coriaceous; without keel; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 2.3-6.5(-12) mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3.7-4.5 mm long.
    Distribution
    North America: northwest USA and southwest .
    Reference
    Triticeae. Fl N Amer 2007.

    Images

    Distribution

    Native to:

    Arizona, British Columbia, California, Colorado, Idaho, Mexico Northeast, Mexico Northwest, Montana, Nevada, New Mexico, Oregon, Texas, Utah, Washington, Wyoming

    Introduced into:

    Hawaii

    Leymus triticoides (Buckley) Pilg. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Suksdorf, W. [7861], Washington K001065448
    Orcutt, C.R. [s.n.], California K001065450
    Orcutt, C.R. [498], California K001065451
    Williams, T. A. [2334], Wyoming K001065447
    Williams, T. A. [2338], Wyoming K001065449

    First published in Bot. Jahrb. Syst. 74: 6 (1947)

    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.
    • 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.

    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

    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