1. Family: Poaceae Barnhart
    1. Genus: Dichanthium Willemet
      1. Dichanthium mucronulatum Jansen

        This species is accepted, and its native range is Thailand to Peninsula Malaysia.

    [GB]
    Habit
    Perennial; caespitose. Culms 30-75 cm long; wiry. Ligule an eciliate membrane; 2-3 mm long. Leaf-blades tapering towards sheath; 15-30 cm long; 2-3 mm wide. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; 2.5 cm long. Rhachis fragile at the nodes; subterete; glabrous on margins. Rhachis internodes filiform. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; without a translucent median line; glabrous.
    Spikelets
    Basal sterile spikelets well-developed; 2 in number; male; elliptic; equalling fertile. Basal sterile spikelet glumes chartaceous; lemmas awnless. Companion sterile spikelets well-developed; male; elliptic; 3.8 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 9 -veined; dentate; 3 -fid. Companion sterile spikelet lemmas 1; enclosed by glumes; muticous. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3.6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 0.5 mm long; pilose; base obtuse; attached transversely.
    Sterile
    Basal sterile spikelets well-developed; 2 in number; male; elliptic; equalling fertile. Basal sterile spikelet glumes chartaceous; lemmas awnless. Companion sterile spikelets well-developed; male; elliptic; 3.8 mm long; as long as fertile; separately deciduous. Companion sterile spikelet glumes chartaceous; 9 -veined; dentate; 3 -fid. Companion sterile spikelet lemmas 1; enclosed by glumes; muticous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3.6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 0.5 mm long; pilose; base obtuse; attached transversely.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; 1 length of spikelet; cartilaginous; without keels; keel-less except near apex; winged on keel; winged narrowly; winged near apex; 7 -veined. Lower glume surface convex; glabrous. Lower glume margins eciliate. Lower glume apex dentate; 3 -fid. Upper glume lanceolate; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret 2.4 mm long; hyaline; ciliate on margins. Fertile lemma linear; 2.6 mm long; hyaline; without keel; 1 -veined. Lemma apex entire, or dentate; 2 -fid; awned; 1 -awned. Principal lemma awn apical, or from a sinus; geniculate; 15-25 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.
    Flowers
    Anthers 3; 1.5 mm long.
    Distribution
    Asia-tropical: Indo-China and Malesia.
    Reference
    Andropogoneae. Gilliland.

    Images

    Distribution

    Native to:

    Malaya, Thailand

    Dichanthium mucronulatum Jansen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Ridley, H.N. [8129], Peninsular Malaysia K000290066 isotype
    Larsen, K. [8838], Thailand K000688668
    Larsen, K. [8838], Thailand K000688667
    Put [2480], Thailand K000620498

    First published in Acta Bot. Neerl. 1: 473 (1952)

    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.
    • Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655.
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.

    Literature

    Kew Backbone Distributions
    • Gilliland, H.B. (1971). A revised flora of Malaya 3: 1-319. The Royal Botanic Gardens, Singapore.

    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