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  1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus tianschanicus (Drobow) Tzvelev

        This species is accepted, and its native range is Iran to Central Asia and N. China.

    [GB]
    Habit
    Perennial. Rhizomes elongated. Culms 60-120 cm long. Ligule an eciliate membrane. Leaf-blades involute; 10-20 cm long; 3-4 mm wide; coriaceous; stiff; glaucous. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence composed of racemes. Peduncle antrorsely scabrous above. Racemes 1; single; bilateral; 15-21 cm long. Rhachis flattened; pilose on surface; scabrous on margins. Spikelet packing broadside to rhachis; crowded; with lowest internode elongated. Spikelets in pairs, or in threes. Fertile spikelets sessile; 2-3 in the cluster.
    Spikelets
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose.
    Fertile
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume subulate, or linear; 20-30 mm long; 1 length of upper glume; 1 -veined. Lower glume surface scabrous. Upper glume subulate, or linear; 20-30 mm long; 2 length of adjacent fertile lemma; 1 -veined. Upper glume surface scabrous.
    Florets
    Fertile lemma lanceolate; 10-15 mm long; coriaceous; without keel; 5 -veined. Lemma surface scabrous; rough below. Lemma apex acute; awned; 1 -awned. Principal lemma awn 15-20 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    Asia-temperate: Soviet Middle Asia, western Asia, and China.
    Reference
    Triticeae. Fl Iran 1993.

    Distribution

    Native to:

    Inner Mongolia, Iran, Kazakhstan, Kirgizstan, Tadzhikistan, Turkmenistan, Uzbekistan, Xinjiang

    Synonyms

    Other Data

    Leymus tianschanicus (Drobow) Tzvelev appears in other Kew resources:

    Bibliography

    First published in Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 20: 429 (1960)

    Accepted by

    • 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.

    Literature

    Kew Backbone Distributions

    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Bor, N.L. (1970). Flora Iranica 70: 1-573. Naturhistorisches Museums Wien.
    • Ovczinnikov, P.N. (ed.) (1957). Flora Tadzhikskoi SSR 1: 1-547. Izd-vo Akademii nauk SSSR, Moskva.
    • 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

    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