1. Family: Poaceae Barnhart
    1. Genus: Leymus Hochst.
      1. Leymus altus D.F.Cui

        This species is accepted, and its native range is NW. China.

    [GB]
    Habit
    Perennial; culms solitary, or caespitose; clumped loosely. Culms erect; 80-150 cm long; 2 -noded. Culm-internodes glaucous; smooth; distally glabrous. Leaves mostly basal. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 2 mm long. Leaf-blades flat, or involute; 4-5 mm wide; stiff. Leaf-blade surface scabrous; rough adaxially.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; erect; bilateral; 8-15 cm long; 7-9 mm wide. Rhachis flattened; puberulous on surface. Spikelet packing broadside to rhachis. Rhachis internodes 5-30 mm long. Spikelets in pairs, or in threes. Fertile spikelets sessile; (1-)2-3 in the cluster.
    Spikelets
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-18 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus pilose. Rhachilla internodes 1.5-2 mm long; pubescent. Floret callus pilose. Floret callus hairs 1 mm long.
    Fertile
    Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-18 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus pilose. Rhachilla internodes 1.5-2 mm long; pubescent. Floret callus pilose. Floret callus hairs 1 mm long.
    Glume
    Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume linear; 10-15 mm long; 0.9 length of upper glume; coriaceous; much thinner on margins; 1-keeled; 3 -veined. Lower glume lateral veins obscure. Lower glume margins ciliate. Lower glume apex acuminate to setaceously attenuate. Upper glume linear; 10-15 mm long; 1 length of adjacent fertile lemma; coriaceous; with membranous margins; 1-keeled; 3 -veined. Upper glume lateral veins obscure. Upper glume margins ciliate. Upper glume apex attenuate, or setaceously attenuate.
    Florets
    Fertile lemma lanceolate; 10-14 mm long; chartaceous; keeled; 5 -veined. Lemma surface puberulous. Lemma margins ciliate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1-3 mm long overall. Palea 1 length of lemma; 2 -veined; 2-keeled. Palea keels ciliate; adorned above. Palea apex emarginate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3-4 mm long; yellow.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Fl China 2005.

    Distribution

    Native to:

    Xinjiang

    Leymus altus D.F.Cui appears in other Kew resources:

    First published in Fl. Xinjiangensis 6: 604 (1996)

    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