1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus paboanus (Claus) Pilg.

        This species is accepted, and its native range is S. European Russia to Mongolia and Afghanistan.

    [GB]
    Habit
    Perennial. Rhizomes elongated. Butt sheaths persistent and investing base of culm. Culms erect; 20-50 cm long. Ligule an eciliate membrane. Leaf-blades convolute; 7-15 cm long; 1-3 mm wide; coriaceous; stiff. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 8-15 cm long; 8-10 mm wide. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; crowded; with subequal internodes, or lowest internode elongated. Spikelets in pairs. Fertile spikelets sessile; 2 in the cluster.
    Spikelets
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 13 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 elliptic; laterally compressed; 13 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume subulate; 7-9 mm long; 1 length of upper glume; 1 -veined. Upper glume subulate; 7-9 mm long; 1 length of adjacent fertile lemma; 1 -veined.
    Florets
    Fertile lemma elliptic; 7-9 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface scabrous; glabrous, or pilose. Lemma apex dentate; 2 -fid; acute; mucronate. 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
    Europe: eastern. Asia-temperate: Siberia, Soviet Middle Asia, western Asia, China, and Mongolia.
    Reference
    Triticeae. Fl Iran 1993.

    Distribution

    Native to:

    Afghanistan, Altay, Buryatiya, China North-Central, Inner Mongolia, Kazakhstan, Kirgizstan, Mongolia, Qinghai, South European Russi, Turkmenistan, Tuva, Uzbekistan, West Siberia, Xinjiang

    Introduced into:

    Primorye

    Leymus paboanus (Claus) Pilg. appears in other Kew resources:

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

    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.
    • Probatova, N.S. & al. (2006). Flora Rossi?skogo Dal'nego Vostoka. Dopolneniya i izmeneniya k izdaniyu Sosudistye rasteniya sovetskogo Dal'nego Vostoka t. 1-8 (1985-1996): 1-454. Russian academy of sciences Far Eastern branch.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

    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.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Probatova, N.S. & al. (2006). Flora Rossi?skogo Dal'nego Vostoka. Dopolneniya i izmeneniya k izdaniyu Sosudistye rasteniya sovetskogo Dal'nego Vostoka t. 1-8 (1985-1996): 1-454. Russian academy of sciences Far Eastern branch.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Fedorov, A.A. (ed.) (1999). Flora of Russia. The European part and bordering regions 1: 1-546. A.A. Balkema, Rotterdam, Broekfield.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.
    • Bor, N.L. (1970). Flora Iranica 70: 1-573. Naturhistorisches Museums Wien.
    • Roshevitz, R.J. & al. (eds.) (1950). Flora Kirgizskoi SSR 2: 1-315. Frunze : Izd-vo KirgizFAN SSSR.

    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