1. Family: Poaceae Barnhart
    1. Genus: Bonia Balansa
      1. Bonia tonkinensis Balansa

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 2000 cm long; 10-12 mm diam.; woody; without nodal roots. Culm-internodes terete; thin-walled; brown. Lateral branches dendroid. Branch complement many. Leaves cauline. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base truncate; without a false petiole. Leaf-blades lanceolate; 15-18 cm long; 12-16 mm wide. Leaf-blade venation indistinct; with obscure cross veins. Leaf-blade surface glabrous. Leaf-blade margins undulate; smooth. Leaf-blade apex acuminate.
    Inflorescences
    Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafy between clusters.
    Spikelets
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 1 mm long. Rhachilla internodes definite.
    Fertile
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 1 mm long. Rhachilla internodes definite.
    Glume
    Glumes two. Upper glume oblong, or ovate. Upper glume lateral veins obscure.
    Florets
    Fertile lemma oblong; 6-8 mm long; without keel; 7 -veined. Lemma apex apiculate. Palea oblong; 1 length of lemma; 6 -veined. Palea keels ciliate. Palea apex acute. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; membranous. Anthers 6; anther tip apiculate. Stigmas 3. Ovary umbonate; glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Asia-tropical: Indo-China.
    Reference
    Bambuseae. Lecomte 1996.

    Distribution

    Native to:

    Vietnam

    Bonia tonkinensis Balansa appears in other Kew resources:

    First published in J. Bot. (Morot) 4: 29 (1890)

    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.

    Literature

    Kew Backbone Distributions
    • 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

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. 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 2019. 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