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  1. Family: Poaceae Barnhart
    1. Genus: Polytoca R.Br.
      1. Polytoca massiei (Balansa) Schenck ex Henrard

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

    [GB]
    Habit
    Annual. Culms decumbent; 20-75 cm long; 1-2 mm diam.; rooting from lower nodes. Culm-internodes distally glabrous. Culm-nodes pubescent. Leaf-sheaths 1.3-9.4 cm long; glabrous on surface. Leaf-sheath auricles absent, or erect; 0-0.5 mm long. Ligule an eciliate membrane; 0.5-1.5 mm long. Leaf-blades linear, or lanceolate; 3.4-39 cm long; 7-10 mm wide. Leaf-blade venation with 4-8 secondary veins. Leaf-blade surface glabrous, or pilose; with tubercle-based hairs. Leaf-blade margins cartilaginous; scaberulous.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole linear; 1-1.8 cm long; herbaceous. Peduncle widened at apex. Racemes 1; single; unilateral; 0.8-2.1 cm long; bearing few fertile spikelets; bearing 1-3 fertile spikelets on each (and 2(-6) male almost enfolded by topmost female spikelet). Rhachis fragile at the nodes; subterete; glabrous on surface. Rhachis internodes linear; 4-5 mm long; bearing a sterile companion laterally. Rhachis internode tip cupuliform. Sexes segregated; on bisexual branches; with male above. Spikelets embracing internode; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Male spikelets sessile and pedicelled; 2 in a cluster. Pedicels fused to internode; united wholly.
    Sterile
    Companion sterile spikelets rudimentary, or well-developed; linear, or lanceolate; 1.5-3.25 mm long; shorter than fertile; deciduous with the fertile.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 7-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; without keels; winged on margins; winged near apex. Lower glume surface asperulous; transversely waisted; glabrous. Lower glume apex emarginate. Upper glume ovate, or orbicular; 4.5-5.2 mm long; herbaceous, or coriaceous; without keels; 15-17 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic, or ovate; 4.5-5 mm long; hyaline; 3 -veined; acute. Fertile florets female. Fertile lemma oblong, or ovate; 4-4.5 mm long; hyaline; without keel. Lemma apex acute. Palea present; oblong, or ovate; 3-4 mm long; hyaline.
    Fruits
    Caryopsis with adherent pericarp; 2-3 mm long. Hilum punctiform.
    Spikelets
    Male spikelets resembling female; with pedicels fused to rhachis; elliptic to ovate; 2.5-5 mm long. Male spikelet glumes 2; 6-9 -veined. Companion sterile spikelets rudimentary, or well-developed; linear, or lanceolate; 1.5-3.25 mm long; shorter than fertile; deciduous with the fertile. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 7-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
    Male
    Male spikelets resembling female; with pedicels fused to rhachis; elliptic to ovate; 2.5-5 mm long. Male spikelet glumes 2; 6-9 -veined.
    Distribution
    Asia-temperate: China. Asia-tropical: Indo-China.
    Reference
    Andropogoneae. Jannik & Veldkamp 2004.

    Distribution

    Native to:

    Hainan, Laos, Thailand, Vietnam

    Synonyms

    Other Data

    Polytoca massiei (Balansa) Schenck ex Henrard appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Apr 30, 2008 Laegaard, S. [21717], Thailand Chionachne massiei K000648086
    Jan 21, 2008 Kerr, A.F.G. [4510], Thailand Chionachne massiei K000620672
    Jan 21, 2008 Kerr, A.F.G. [4510], Thailand Chionachne massiei K000620673
    Jan 21, 2008 Kerr, A.F.G. [4216], Thailand Chionachne massiei K000620676
    Jan 21, 2008 Kerr, A.F.G. [4216], Thailand Chionachne massiei K000620677
    Jan 21, 2008 Sorensen, Th. [5931], Thailand Chionachne massiei K000648036
    Jan 21, 2008 Larsen, K. [8106], Thailand Chionachne massiei K000648038
    Jan 21, 2008 Smitinand, T. [3883], Thailand Chionachne massiei K000648037
    Jan 21, 2008 Laegaard, S. [21717], Thailand Chionachne massiei K000648035
    Jan 18, 2008 Kerr, A.F.G. [1694], Thailand Chionachne massiei K000620674
    Jan 18, 2008 Kerr, A.F.G. [1694], Thailand Chionachne massiei K000620675

    Bibliography

    First published in Meded. Rijks-Herb. 67: 9 (1931)

    Not 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. [Cited as Chionachne massiei.]

    Literature

    Kew Backbone Distributions

    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.

    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