Skip to main content
  1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus atratus (Nevski) Hand.-Mazz.

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Culms slender; 25-50 cm long. Leaf-sheaths smooth. Ligule an eciliate membrane. Leaf-blades convolute; 2 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; drooping; bilateral; 5-11 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 5-12 mm long. Spikelets in pairs. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2-5 mm long; 1 length of upper glume; coriaceous; without keels; 2-3 -veined. Lower glume surface asperulous. Lower glume apex acuminate; muticous, or awned; 1 -awned. Lower glume awn 0-4 mm long. Upper glume lanceolate; 2-5 mm long; 0.25-0.5 length of adjacent fertile lemma; coriaceous; without keels; 2-3 -veined. Upper glume surface asperulous. Upper glume apex acuminate; muticous, or awned; 1 -awned. Upper glume awn 0-4 mm long.
    Florets
    Fertile lemma lanceolate; 7-9 mm long; coriaceous; 5 -veined. Lemma surface scaberulous. Lemma apex acute; awned; 1 -awned. Principal lemma awn spreading; 11-12 mm long overall. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous; ciliate. Anthers 3. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Nevski 1995.

    Distribution

    Native to:

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

    Synonyms

    Other Data

    Elymus atratus (Nevski) Hand.-Mazz. appears in other Kew resources:

    Bibliography

    First published in Symb. Sin. 7: 1293 (1922)

    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