1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus ajanensis (J.J.Vassil.) Tzvelev

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms 40-80 cm long. Ligule an eciliate membrane. Leaf-blades flat, or convolute; 3-6 mm wide; coriaceous; stiff; glaucous. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence composed of racemes. Peduncle pubescent above. Racemes 1; single; linear; bilateral; 5-10 cm long. Rhachis pubescent on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear. Spikelets appressed; in pairs, or in threes. Fertile spikelets sessile; 2-3 in the cluster.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 10-18 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; 10-18 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 1 length of upper glume; chartaceous; 3 -veined. Lower glume lateral veins obscure. Lower glume surface pubescent; hairy above. Upper glume lanceolate; 5-12 mm long; 0.8-1 length of adjacent fertile lemma; chartaceous; 3 -veined. Upper glume lateral veins obscure. Upper glume surface pubescent; hairy above.
    Florets
    Fertile lemma lanceolate; 6-14 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent. Lemma apex acute; muticous. Palea 2 -veined. Palea keels scabrous; eciliate. Apical sterile florets resembling fertile though underdeveloped.
    Distribution
    Asia-temperate: Siberia and Soviet far east.
    Reference
    Triticeae. Fl Sib 1995.

    Distribution

    Native to:

    Alaska, Kamchatka, Khabarovsk, Krasnoyarsk, Magadan, Yakutskiya

    Leymus ajanensis (J.J.Vassil.) Tzvelev appears in other Kew resources:

    First published in Novosti Sist. Vyssh. Rast. 9: 59 (1972)

    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.

    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.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Kharkevich, S.S., Probatova, N.S. & Novikov, V.S. (1985). Sosudistye rasteniia sovetskogo Dal’nego Vostoka 1: 1-383. Izd-vo "Nauka," Leningradskoe otd-nie, Leningrad.

    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