1. Family: Poaceae Barnhart
    1. Genus: Oplismenus P.Beauv.
      1. Oplismenus thwaitesii Hook.f.

        This species is accepted, and its native range is Sri Lanka.

    [GB]
    Habit
    Annual. Culms prostrate; 10-25 cm long. Ligule a ciliate membrane. Leaf-blades lanceolate, or ovate; 1-3 cm long; 2.5-5 mm wide. Leaf-blade venation with obscure cross veins.
    Inflorescences
    Inflorescence composed of racemes. Racemes 3-4; borne along a central axis; unilateral; 1-2 cm long. Central inflorescence axis 3-6 cm long. Rhachis angular; glabrous on surface. Spikelet packing lax. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal, or the lower smaller. Pedicels oblong.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5-3.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5-3.5 mm long; falling entire.
    Glume
    Glumes similar, or dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; 0.5-0.75 length of spikelet; herbaceous; 1-keeled; 5 -veined. Lower glume surface pubescent. Lower glume apex acute; awned; 1 -awned. Lower glume awn 0.5-1.5 mm long; without vesture (but scaberulous). Upper glume ovate; herbaceous; 1-keeled; 5-7 -veined. Upper glume surface pubescent. Upper glume apex obtuse; muticous, or mucronate.
    Florets
    Basal sterile florets barren; with palea, or without significant palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 1-keeled; 7-11 -veined; pubescent; emarginate; mucronate. Fertile lemma oblong; dorsally compressed; 2-2.5 mm long; coriaceous; shiny; without keel; 7 -veined. Lemma margins involute. Lemma apex acute; laterally pinched. Palea involute; coriaceous; without keels.
    Distribution
    Asia-tropical: India.
    Reference
    Paniceae. FTEA.
    Diagnostic
    Spikelet pairs 2-5mm apart.

    Images

    Distribution

    Native to:

    Sri Lanka

    Oplismenus thwaitesii Hook.f. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    s.coll. [3964], Sri Lanka K000245605
    s.coll. [3964], Sri Lanka K000245216
    s.coll. [3964], Sri Lanka K000245215

    First published in H.Trimen, Handb. Fl. Ceylon 5: 169 (1900)

    Accepted by

    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Dassanayake (ed.) (1994). A Revised Handbook to the Flora of Ceylon 8: 1-458. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.

    Literature

    Kew Backbone Distributions
    • Dassanayake (ed.) (1994). A Revised Handbook to the Flora of Ceylon 8: 1-458. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.

    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