1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus aristiglumis (Keng & S.L.Chen) S.L.Chen

        This species is accepted, and its native range is W. & Central China.

    [GB]
    Habit
    Perennial; culms solitary, or caespitose; clumped loosely. Culms erect; 40-45 cm long; 2 mm diam.; 1-2 -noded; with 0.15-0.25 of their length below uppermost node. Culm-internodes smooth; distally pruinose. Leaf-sheaths 10 cm long; mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 0.2-0.5 mm long; scarious; truncate. Leaf-blades linear, or lanceolate; 6-8 cm long; 4-5 mm wide. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins ciliate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; drooping; bilateral; 6-8 cm long; 8-20 mm wide; bearing 11-14 fertile spikelets on each. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; crowded; regular; 2 -rowed. Rhachis internodes 3-10 mm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Basal sterile spikelets rudimentary; 1 in number. Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.2 mm long.
    Sterile
    Basal sterile spikelets rudimentary; 1 in number.
    Fertile
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-3 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.2 mm long.
    Glume
    Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate; 3-4 mm long; coriaceous; without keels; 1-2(-3) -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 3-7 mm long. Upper glume oblong; 3-5 mm long; coriaceous; without keels; 3-5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 3-7 mm long.
    Florets
    Fertile lemma lanceolate to oblong; 10 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy below. Lemma apex awned; 1 -awned. Principal lemma awn reflexed; 20-30 mm long overall. Palea 1 length of lemma; 2 -veined. Palea surface puberulous; hairy on back; hairy above. Palea apex emarginate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 2 mm long; purple. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp; 5 mm long; hairy at apex; apex unappendaged. Hilum linear.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Chen 2001.

    Distribution

    Native to:

    China North-Central, China South-Central, Qinghai, Tibet, Xinjiang

    Elymus aristiglumis (Keng & S.L.Chen) S.L.Chen appears in other Kew resources:

    First published in Bull. Nanjing Bot. Gard. 1987: 9 (1988)

    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