1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus formosanus (Honda) Á.Löve

        This species is accepted, and its native range is Taiwan.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Butt sheaths glabrous, or pubescent. Culms erect; 30-80 cm long; 1-1.7 mm diam.; 3-4 -noded. Leaves basal and cauline. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades 6-20 cm long; 3-6 mm wide. Leaf-blade surface smooth, or scaberulous; glabrous.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 7-18 cm long; 5 mm wide. Rhachis flattened. Spikelet packing broadside to rhachis. Rhachis internodes linear; 7-15 mm long. Rhachis internode tip flat. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 4-8 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 15-20 mm long; 4-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.4-1.6 mm long; scaberulous; sparsely hairy. Floret callus pilose. Floret callus hairs 2-3 mm long; 0.25 length of lemma.
    Fertile
    Spikelets comprising 4-8 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 15-20 mm long; 4-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.4-1.6 mm long; scaberulous; sparsely hairy. Floret callus pilose. Floret callus hairs 2-3 mm long; 0.25 length of lemma.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5-7 mm long; 0.75 length of upper glume; coriaceous; much thinner on margins; without keels; 5-7 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acute. Upper glume lanceolate; 7-9 mm long; coriaceous; with membranous margins; without keels; 5-7 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 8-11 mm long; coriaceous; 5 -veined. Lemma lateral veins ribbed. Lemma surface scaberulous; glabrous, or puberulous. Lemma margins ciliate. Lemma apex acute; awned; 1 -awned. Principal lemma awn curved; 20-35 mm long overall. Palea 1 length of lemma. Palea keels winged; narrowly winged; ciliate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: eastern Asia.
    Reference
    Triticeae. Koyama 1994.

    Distribution

    Elymus formosanus (Honda) Á.Löve appears in other Kew resources:

    First published in Feddes Repert. 95: 449 (1984)

    Accepted by

    • Jung, M.J. & Chen, C.W. (2013). Elymus L. (Poaceae) in Taiwan and related species in neighbor areas Taiwania 58: 53-60.
    • 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