1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus yiunensis N.R.Cui & D.F.Cui

        This species is accepted, and its native range is NW. China.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Rhizomes elongated. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 25-35 cm long. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface; outer margin glabrous, or hairy. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades flat, or involute; 4-9 cm long; 1-2 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; erect; bilateral; 5-11 cm long; 5-10 mm wide. Rhachis flattened; ciliate on margins. Spikelet packing broadside to rhachis. Rhachis internodes 3-7 mm long. Spikelets in pairs. Fertile spikelets sessile; 2 in the cluster.
    Spikelets
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 7-11 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-1.5 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.5-1 mm long.
    Fertile
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 7-11 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-1.5 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.5-1 mm long.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5-8 mm long; 0.9 length of upper glume; 1 -veined. Lower glume lateral veins obscure. Lower glume surface pubescent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 8-9 mm long; 1-1.1 length of adjacent fertile lemma; 1 -veined. Upper glume lateral veins absent. Upper glume surface pubescent. Upper glume margins ciliate. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma lanceolate; 7-9 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy all along. Lemma margins ciliate. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3 mm long; yellow. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Cui 2006.

    Distribution

    Native to:

    Xinjiang

    Leymus yiunensis N.R.Cui & D.F.Cui appears in other Kew resources:

    First published in Fl. Xinjiangensis 6: 603 (1996)

    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.

    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