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  1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus mundus L.B.Cai & X.Su

        This species is accepted, and its native range is Tibet, China (Gansu).

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Butt sheaths persistent and investing base of culm; with compacted dead sheaths, or fibrous dead sheaths. Culms erect; 25-55 cm long; 1.5-2.1 mm diam.; 3-4 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1-1.6 mm long; obtuse. Leaf-blades involute; 3-21 cm long; 2.5-4 mm wide; coriaceous; stiff. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; erect; linear; bilateral; 4-10 cm long; 8-10 mm wide. Rhachis scabrous on surface; ciliate on margins. Spikelet packing broadside to rhachis; crowded; with subequal internodes, or lowest internode elongated. Rhachis internodes 4-5 mm long. Spikelets in pairs, or in threes. Fertile spikelets sessile; 2-3 in the cluster.
    Spikelets
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5-1 mm long; scaberulous.
    Fertile
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5-1 mm long; scaberulous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 8-10 mm long; 1 length of upper glume; much thinner on margins; 1-keeled; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume margins eciliate, or ciliolate. Lower glume apex setaceously attenuate. Upper glume lanceolate; 8-10 mm long; 1-1.1 length of adjacent fertile lemma; with membranous margins; 1-keeled; 1-3 -veined. Upper glume lateral veins absent, or obscure. Upper glume margins eciliate, or ciliolate. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma lanceolate; 8-9 mm long; coriaceous; much thinner on margins; without keel; 7 -veined. Lemma margins without distinctive roughness, or scaberulous. Lemma apex acuminate. Palea 2 -veined. Palea keels smooth. Palea apex emarginate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3 mm long. Ovary pubescent on apex.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Cai & Su 2009.

    Distribution

    Native to:

    China North-Central, Tibet

    Other Data

    Leymus mundus L.B.Cai & X.Su appears in other Kew resources:

    Bibliography

    First published in Bull. Bot. Res., Harbin 27: 655 (2007)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    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