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

        This species is accepted, and its native range is Xinjiang to Qinghai.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 35-60 cm long; 1.2-2 mm diam.; 3-4 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1-2 mm long; obtuse. Leaf-blades involute; 5-18 cm long; 2-3.5 mm wide; coriaceous; stiff. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; erect; linear; bilateral; 6-13 cm long; 5-7.5 mm wide. Rhachis villous on margins. Spikelet packing broadside to rhachis; lax. Rhachis internodes 5-8 mm long. Spikelets solitary, or in pairs. Fertile spikelets sessile; 1-2 in the cluster.
    Spikelets
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 9-13 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 oblong; laterally compressed; 9-13 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5-1 mm long; scaberulous.
    Glume
    Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 8-10.5 mm long; 1 length of upper glume; coriaceous; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume margins ciliate. Lower glume apex awned; 1 -awned. Lower glume awn 3-4 mm long. Upper glume lanceolate; 8-10.5 mm long; 1.1-1.2 length of adjacent fertile lemma; coriaceous; 1 -veined. Upper glume lateral veins absent. Upper glume margins ciliate. Upper glume awned; 1 -awned. Upper glume awn 3-4 mm long.
    Florets
    Fertile lemma lanceolate; 7-8.5 mm long; coriaceous; without keel; 5 -veined. Lemma lateral veins distinct. Lemma surface pubescent. Lemma apex awned; 1 -awned. Principal lemma awn 1-3 mm long overall. Palea 6-7.5 mm long; 2 -veined. Palea keels scabrous. Palea apex acute. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 4.2-4.7 mm long; yellow. Ovary pubescent on apex.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Cai & Su 2009.

    Distribution

    Native to:

    Qinghai, Xinjiang

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

    First published in Bull. Bot. Res., Harbin 27: 654 (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