1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus serotinus (Keng) Á.Löve ex B.Rong Lu

        This species is accepted, and its native range is Qinghai to China (Henan, Shaanxi).

    [GB]
    Habit
    Perennial; caespitose. Culms erect, or geniculately ascending; 40-50 cm long; 0.5-1.2 mm diam.; 2-3 -noded; with 0.4-0.5 of their length below uppermost node. Culm-internodes smooth; distally glabrous. Leaf-sheaths 7-10 cm long; mostly shorter than adjacent culm internode, or subequal to internodes; pilose; outer margin hairy. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades involute; 9-11(-20) cm long; 1-2 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; drooping; bilateral; 6-10 cm long; bearing 5-11 fertile spikelets on each. Rhachis flattened; glabrous on surface; scaberulous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 7-15 mm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12-13 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; pubescent. Floret callus pubescent.
    Fertile
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12-13 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; pubescent. Floret callus pubescent.
    Glume
    Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate, or oblong; 5-6 mm long; coriaceous; without keels; 3-5 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acute, or acuminate; muticous. Upper glume lanceolate, or oblong; 7-8 mm long; coriaceous; without keels; 3-5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acute, or acuminate; awned; 1 -awned. Upper glume awn 2-5 mm long.
    Florets
    Fertile lemma lanceolate, or oblong; 10 mm long; coriaceous; without keel; 5 -veined. Lemma surface puberulous. Lemma apex awned; 1 -awned. Principal lemma awn reflexed; 25-30 mm long overall. Palea 1 length of lemma; 2 -veined. Palea surface puberulous; hairy on back; hairy above. Palea apex truncate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. 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 Southeast, Qinghai

    Elymus serotinus (Keng) Á.Löve ex B.Rong Lu appears in other Kew resources:

    First published in Nordic J. Bot. 15: 21 (1995)

    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