1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus altissimus (Keng & S.L.Chen) Á.Löve ex B.Rong Lu

        This species is accepted, and its native range is Xinjiang to S. Central China.

    [GB]
    Habit
    Perennial; caespitose. Basal innovations intravaginal. Culms erect; 150-200 cm long; 2 mm diam.; 5-6 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; scarious; truncate. Leaf-blades 25-41 cm long; 6-10 mm wide; glaucous. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence composed of racemes. Peduncle 22 cm long. Racemes 1; single; erect, or ascending; bilateral; 15-18 cm long. Rhachis flattened; glabrous on surface; scabrous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 12-20(-30) mm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 3-6 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 10-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose. Floret callus pubescent. Floret callus hairs 0.7 mm long.
    Fertile
    Spikelets comprising 3-6 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 10-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose. Floret callus pubescent. Floret callus hairs 0.7 mm long.
    Glume
    Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume oblong; 5 mm long; coriaceous; without keels; 3-7 -veined. Lower glume apex acute; muticous. Upper glume oblong; 6 mm long; coriaceous; without keels; 5-7 -veined. Upper glume apex acute; muticous.
    Florets
    Fertile lemma lanceolate, or oblong; 10 mm long; coriaceous; without keel; 5 -veined. Lemma surface puberulous; hairy at base. Lemma margins pubescent. Lemma apex awned; 1 -awned. Principal lemma awn curved; 20 mm long overall. Palea 0.9 length of lemma; 2 -veined. Palea keels ciliolate; adorned above; with 0.33 of their length adorned. Palea apex emarginate, or obtuse. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp; hairy at apex; apex unappendaged. Hilum linear.
    Distribution
    Asia-temperate: China.
    Reference
    Triticeae. Chen 2001.

    Distribution

    Native to:

    China South-Central, Qinghai, Xinjiang

    Elymus altissimus (Keng & S.L.Chen) Á.Löve ex B.Rong Lu appears in other Kew resources:

    First published in Nordic J. Bot. 15: 24 (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