1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus antiquus (Nevski) Tzvelev

        This species is accepted, and its native range is Nepal to S. Central China.

    [GB]
    Habit
    Perennial; caespitose. Butt sheaths purple. Culms erect; 50-65 cm long; 2-3 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.3-0.5 mm long; lacerate; truncate. Leaf-blades 11-18 cm long; 2-4.5 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; drooping; bilateral; 10-15 cm long. Rhachis flattened; glabrous on surface; scabrous on margins; ciliate on margins. Spikelet packing broadside to rhachis; lax. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets linear, or lanceolate; laterally compressed; 14-20 mm long; falling entire. Spikelet callus base truncate. Rhachilla internodes 2.5-3 mm long; eventually visible between lemmas; pubescent.
    Fertile
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets linear, or lanceolate; laterally compressed; 14-20 mm long; falling entire. Spikelet callus base truncate. Rhachilla internodes 2.5-3 mm long; eventually visible between lemmas; pubescent.
    Glume
    Glumes similar; shorter than spikelet. Lower glume lanceolate; 2.5-3 mm long; 0.66 length of upper glume; coriaceous; without keels; 1-3 -veined. Lower glume lateral veins prominent. Lower glume surface asperulous; rough on veins. Lower glume apex acute. Upper glume lanceolate; 3.5-4.5 mm long; 0.5 length of adjacent fertile lemma; coriaceous; without keels; 1-3 -veined. Upper glume lateral veins prominent. Upper glume surface asperulous; rough on veins. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 8 mm long; coriaceous; purple; keeled; keeled above; 5 -veined. Lemma surface puberulous. Lemma apex acute; awned; 1 -awned. Principal lemma awn curved; 12-20 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate; adorned above. Palea surface glabrous, or puberulous; hairy on back; hairy above. Palea apex emarginate, or truncate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 1.5-2 mm long; purple. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China. Asia-tropical: India.
    Reference
    Triticeae. Bor 1997.

    Distribution

    Native to:

    China South-Central, Nepal, Qinghai, Tibet

    Elymus antiquus (Nevski) Tzvelev appears in other Kew resources:

    First published in Trudy Bot. Inst. Komarova Akad. Nauk SSSR, Rast. Tsentral. Azii 4: 220 (1968)

    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.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.

    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