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  1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus caesifolius Á.Löve ex S.L.Chen

        This species is accepted, and its native range is Tibet.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms erect; 50 cm long; 2 mm diam.; 2-3 -noded; with 0.33-0.5 of their length below uppermost node. Culm-nodes glabrous. Leaf-sheaths 12.5-18.5 cm long; glabrous on surface. Ligule an eciliate membrane; 0.2-0.5 mm long; scarious; truncate. Leaf-blades erect; 6.5-12 cm long; 3-5 mm wide; glaucous. Leaf-blade surface scabrous; rough adaxially, or on both sides. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; erect; bilateral; 6.5-10 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 8-16 mm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 13-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-1.3 mm long; pubescent. Floret callus pubescent.
    Fertile
    Spikelets comprising 3-5 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 13-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1-1.3 mm long; pubescent. Floret callus pubescent.
    Glume
    Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate, or oblong; 4-7 mm long; coriaceous; much thinner on margins; without keels; 3 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acute, or acuminate; muticous. Upper glume lanceolate, or oblong; 6-8 mm long; coriaceous; with scarious margins; without keels; 3-5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate; muticous.
    Florets
    Fertile lemma lanceolate, or oblong; 9-11 mm long; coriaceous; without keel; 5 -veined. Lemma surface scabrous; rough on veins. Lemma apex awned; 1 -awned. Principal lemma awn reflexed; 15-30 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate; adorned above. Palea surface pubescent; hairy on back; hairy above. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp; hairy at apex; apex unappendaged. Hilum linear.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Chen 2001.

    Distribution

    Synonyms

    Other Data

    Elymus caesifolius Á.Löve ex S.L.Chen appears in other Kew resources:

    Bibliography

    First published in Fl. China 22: 412 (2006)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

    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