1. Family: Poaceae Barnhart
    1. Genus: Elymus L.
      1. Elymus semicostatus (Steud.) Melderis

        This species is accepted, and its native range is Afghanistan to Himalaya.

    [GB]
    Habit
    Perennial; caespitose. Culms erect, or geniculately ascending; 45-135 cm long. Leaf-sheaths glabrous on surface, or hirsute. Ligule an eciliate membrane. Leaf-blades flat, or involute; 15-30 cm long; 4-8(-12) mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous, or hirsute.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; straight, or arcuate; bilateral; 8-30 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 20-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 20-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes similar; shorter than spikelet. Lower glume lanceolate, or elliptic; 10-16.5 mm long; 0.9 length of upper glume; coriaceous; without keels; 5 -veined. Lower glume lateral veins ribbed. Lower glume surface scabrous; rough on veins. Lower glume apex acute, or acuminate. Upper glume lanceolate, or elliptic; 11-18 mm long; 0.9-1.3 length of adjacent fertile lemma; coriaceous; without keels; 7 -veined. Upper glume lateral veins ribbed. Upper glume surface scabrous; rough on veins. Upper glume apex acute, or acuminate.
    Florets
    Fertile lemma elliptic; 12-14 mm long; coriaceous; keeled; keeled above; 5 -veined. Lemma surface scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn (4-)12-18 mm long overall. Palea 0.75 length of lemma. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; elliptic; membranous. Anthers 3; 3-4 mm long. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-temperate: western Asia. Asia-tropical: India.
    Reference
    Triticeae. Fl Pak 1993.

    Images

    Distribution

    Native to:

    Afghanistan, East Himalaya, Nepal, Pakistan, West Himalaya

    Introduced into:

    Georgia, Oregon

    Elymus semicostatus (Steud.) Melderis appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Hooker, J.D. [s.n.], India K000032436 holotype
    Thomson, T. [s.n.], India K000032433 Unknown type material
    Thomson, T. [s.n.], Tibet K000674949
    Clarke, C.B. [29116], India K000032431 holotype
    Clarke, C.B. [29116], India K000032432 Unknown type material
    Jacquemont, V. [1688], India K000032434 Unknown type material
    Royle, J.F. [150], India K000032435 Unknown type material

    First published in Enum. Fl. Pl. Nepal 1: 132 (1978)

    Accepted by

    • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Cope, T.A. (1982). Flora of Pakistan 143: 1-678. Department of Botany, University of Karachi, Karachi.

    Literature

    Kew Backbone Distributions
    • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.
    • Bor, N.L. (1970). Flora Iranica 70: 1-573. Naturhistorisches Museums Wien.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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