1. Family: Poaceae Barnhart
    1. Genus: Vietnamosasa T.Q.Nguyen
      1. Vietnamosasa pusilla (A.Chev. & A.Camus) T.Q.Nguyen

        This species is accepted, and its native range is Indo-China.

    [GB]
    Habit
    Perennial. Rhizomes elongated; leptomorph; scaly. Culms 50-150 cm long; 3-8 mm diam.; woody. Culm-internodes terete; thick-walled, or solid; light green; distally glabrous. Lateral branches dendroid. Branch complement many. Culm-sheaths 3-5 cm long. Culm-sheath blade triangular; deciduous; erect; glabrous on surface. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose. Ligule an eciliate membrane; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.07 cm long. Leaf-blades deciduous at the ligule; lanceolate; 8-14 cm long; 8-10 mm wide; coriaceous; stiff; light green. Leaf-blade venation with 6-8 secondary veins; with distinct cross veins. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade margins scaberulous. Leaf-blade apex attenuate.
    Inflorescences
    Synflorescence on a separate leafless culm. Inflorescence a panicle; subtended by a spatheole; embraced at base by subtending leaf. Peduncle pubescent above. Panicle open; lanceolate; bearing few spikelets. Panicle axis pubescent. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 7-9 fertile florets; with diminished florets at the apex. Spikelets linear, or oblong; laterally compressed; 30-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3 mm long; eventually visible between lemmas.
    Fertile
    Spikelets comprising 7-9 fertile florets; with diminished florets at the apex. Spikelets linear, or oblong; laterally compressed; 30-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3 mm long; eventually visible between lemmas.
    Glume
    Glumes several; 0-2 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 7.5-10 mm long; chartaceous; without keels. Lower glume apex acute. Upper glume ovate; 7.5-10 mm long; chartaceous; without keels. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 8-14 mm long; chartaceous; without keel; 17-23 -veined. Lemma apex obtuse. Palea 7 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; ciliate. Anthers 6; 6-7 mm long; purple. Stigmas 3.
    Fruits
    Caryopsis with adherent pericarp; apex unappendaged.
    Distribution
    Asia-tropical: Indo-China.
    Reference
    Bambuseae. Lecomte 1996.

    Distribution

    Native to:

    Cambodia, Laos, Thailand, Vietnam

    Vietnamosasa pusilla (A.Chev. & A.Camus) T.Q.Nguyen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dransfield, S. [SD 1466], Thailand K000795278
    Dransfield, S. [SD 1428], Thailand K000795279
    Dransfield, S. [SD1427], Thailand K000795359

    First published in Bot. Zhurn. (Moscow & Leningrad) 75: 222 (1990)

    Accepted by

    • Newman, M., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A checklist of the vascular plants of Lao PDR: 1-394. Royal Botanic Gardens, Edinburgh.
    • 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
    • Newman, M., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A checklist of the vascular plants of Lao PDR: 1-394. Royal Botanic Gardens, Edinburgh.
    • Dy Phon, P. (2000). Dictionnaire des plantes utilisées au Cambodge: 1-915. Chez l'auteur, Phnom Penh, Cambodia.
    • Camus, E.G. & Camus, A. in H. Lecomte (1922). Flore Générale de l'indo-Chine 1(3): 193-336.

    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.

    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