1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus angustus (Trin.) Pilg.

        This species is accepted, and its native range is Siberia to N. China.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms geniculately ascending; 60-100 cm long. Culm-internodes smooth. Ligule an eciliate membrane. Leaf-blades 5-7 mm wide; coriaceous; stiff; glaucous. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence composed of racemes. Peduncle antrorsely scabrous above. Racemes 1; single; linear; bilateral; 10-20 cm long; 4-10 mm wide. Rhachis pubescent on margins. Spikelet packing broadside to rhachis; crowded. Rhachis internodes filiform; 10-17 mm long. Spikelets appressed; in pairs. Fertile spikelets sessile; 2 in the cluster.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 12-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 12-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 1 length of upper glume; coriaceous; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Upper glume lanceolate; 11-15 mm long; 1 length of adjacent fertile lemma; coriaceous; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous.
    Florets
    Fertile lemma lanceolate; 11-14 mm long; coriaceous; without keel; 5-7 -veined. Lemma surface puberulous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1.2-2.5 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Distribution
    Asia-temperate: Siberia, Soviet Middle Asia, China, and Mongolia.
    Reference
    Triticeae. Fl USSR 1995.

    Images

    Distribution

    Native to:

    Altay, China North-Central, Inner Mongolia, Kazakhstan, Kirgizstan, Mongolia, Qinghai, Turkmenistan, Tuva, Uzbekistan, West Siberia, Xinjiang

    Introduced into:

    Alberta, British Columbia, Saskatchewan, Yukon

    Leymus angustus (Trin.) Pilg. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Turczaninow, N. S. [s.n.], Russian Federation K001065475
    Turczaninow, N. S. [s.n.], Russian Federation K001065476
    Schrenk, A. G. von [s.n.] K001065477
    Schrenk, A. G. von [450] K001065478

    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.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.

    Literature

    Kew Backbone Distributions
    • Grubov, V.I. (2008). Key to the vascular plants of Mongolia (with an atlas) 2: 1-503. Academy of Sciences, Mongolian People's Republic, Ulaan Bator.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Pavlov, N.V. (ed.) (1956). Flora Kazakhstana 1: 1-354. Alma-Ata, Izd-vo Akademii nauk Kazakhskoi SSR.
    • Merkodovich, N.A. (ed.) (1941). Flora Uzbekistana 1: 1-566. Izd-va Akademii nauk Uzbekskoi SSR, Tashkent.

    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 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