1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus nakaii (Kitag.) S.L.Chen

        This species is accepted, and its native range is N. China to Korea.

    [GB]
    Habit
    Perennial. Culms erect, or geniculately ascending; 50-100 cm long. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface, or pubescent; with reflexed hairs. Ligule an eciliate membrane. Leaf-blades 11-20 cm long; 4-7 mm wide. Leaf-blade surface pilose; hairy adaxially.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; straight; bilateral; 10-13 cm long. Rhachis flattened. Spikelet packing broadside to rhachis. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 14-16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Fertile
    Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 14-16 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
    Glume
    Glumes persistent; similar. Lower glume lanceolate; 9-10 mm long; 0.9 length of upper glume; coriaceous; without keels; 3-7 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate. Upper glume oblong, or ovate; 9.5-11.5 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 3-7 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 10 mm long; coriaceous; 5 -veined. Lemma surface pubescent; hairy on veins. Lemma margins pubescent. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn curved; reflexed; 18-22 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels tuberculate. Palea surface puberulous; hairy on back; hairy above. Palea apex emarginate to obtuse. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; yellow.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Fl China 2005.

    Distribution

    Native to:

    China North-Central, Inner Mongolia, Korea, Manchuria

    Elymus nakaii (Kitag.) S.L.Chen appears in other Kew resources:

    First published in Fl. China 22: 411 (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.

    Not accepted by

    • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST. [Cited as Elymus gmelinii.]

    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