1. Family: Poaceae Barnhart
    1. Genus: Cleistogenes Keng
      1. Cleistogenes songorica (Roshev.) Ohwi

        This species is accepted, and its native range is SW. Siberia to W. Himalaya and China.

    [GB]
    Habit
    Perennial. Culms erect; 20-30 cm long; 1 mm diam.; 4-8 -noded. Culm-internodes similar in length. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths tight; longer than adjacent culm internode; glabrous on surface. Leaf-sheath oral hairs ciliate; 2-3 mm long. Ligule a fringe of hairs; 0.2-0.3 mm long. Leaf-blades 2-8 cm long; 1.5-2.5 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex attenuate; filiform.
    Inflorescences
    Inflorescence composed of racemes. Racemes borne along a central axis; erect, or ascending; unilateral; 0.5-2.5 cm long; bearing few fertile spikelets. Central inflorescence axis 3-6 cm long. Spikelet packing lax. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.
    Spikelets
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 5-8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.2 mm long; pubescent; hairy at tip. Floret callus pubescent.
    Fertile
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 5-8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.8-1.2 mm long; pubescent; hairy at tip. Floret callus pubescent.
    Glume
    Glumes persistent; dissimilar; shorter than spikelet; gaping. Lower glume lanceolate; 2.2-3 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate; 3-3.8 mm long; 0.5-0.6 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex acute; muticous, or mucronate.
    Florets
    Fertile lemma ovate; 3.3-4 mm long; membranous; keeled; 3-5 -veined. Lemma surface asperulous. Lemma margins pubescent; hairy below. Lemma apex entire; obtuse, or acute; mucronate. Principal lemma awn 0.1-0.3 mm long overall. Palea 1 length of lemma; 2 -veined. Palea surface pilose; hairy on flanks. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 2 mm long.
    Fruits
    Caryopsis with adherent pericarp.
    Cleistogene
    Cleistogenes present; in upper sheaths.
    Distribution
    Asia-temperate: Siberia, Soviet Middle Asia, China, and Mongolia.
    Reference
    Eragrostideae. Conert.

    Distribution

    Native to:

    China North-Central, China Southeast, Inner Mongolia, Kazakhstan, Kirgizstan, Mongolia, Qinghai, Turkmenistan, Tuva, Uzbekistan, West Himalaya, Xinjiang

    Cleistogenes songorica (Roshev.) Ohwi appears in other Kew resources:

    First published in J. Jap. Bot. 18: 340 (1942)

    Accepted by

    • Grubov, V.I. (2008). Key to the vascular plants of Mongolia (with an atlas) 2: 1-503. Academy of Sciences, Mongolian People's Republic, Ulaan Bator.
    • 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.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.

    Literature

    Kew Backbone Distributions
    • Grubov, V.I. (2008). Key to the vascular plants of Mongolia (with an atlas) 2: 1-503. Academy of Sciences, Mongolian People's Republic, Ulaan Bator.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.

    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