1. Family: Poaceae Barnhart
    1. Genus: Polytoca R.Br.
      1. Polytoca gigantea (J.Koenig) Mabb.

        This species is accepted, and its native range is Indian Subcontinent to W. Malesia.

    [GB]
    Habit
    Perennial. Culms erect; 100-200 cm long. Culm-nodes bearded. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a ciliate membrane. Leaf-blades 25-60 cm long; 6-18 mm wide. Leaf-blade surface hispid; with tubercle-based hairs.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Synflorescence compound; paniculate. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole lanceolate; 1-2 cm long; scarious. Racemes 1; single; 2.5-4 cm long; bearing few fertile spikelets; bearing 1 fertile spikelets on each (and 4-8 male spikelets). Rhachis fragile at the nodes; subterete. Rhachis internodes linear; bearing a sterile companion laterally. Rhachis internode tip transverse; cupuliform. Sexes segregated; on bisexual branches; with male above. Spikelets embracing internode; solitary, or in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 0-1 in the cluster. Male spikelets sessile and pedicelled; 1-2 in a cluster. Pedicels fused to internode; united wholly.
    Sterile
    Companion sterile spikelets absent, or rudimentary; shorter than fertile.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 4-6 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; shiny. Lower glume elliptic; 1 length of spikelet; indurate; pallid; without keels. Lower glume surface not waisted. Lower glume apex obtuse. Upper glume elliptic; membranous. Upper glume margins ciliate.
    Florets
    Basal sterile florets barren; with palea, or without significant palea. Lemma of lower sterile floret oblong; hyaline; 3-5 -veined. Fertile florets female. Fertile lemma lanceolate; hyaline; without keel; 3 -veined. Lemma apex truncate. Palea hyaline; without keels.
    Flowers
    Lodicules absent.
    Fruits
    Caryopsis with adherent pericarp; 5-7 mm long. Hilum punctiform.
    Spikelets
    Male spikelets distinct from female; with pedicels fused to rhachis; 6-8.5 mm long. Male spikelet glumes 2. Male spikelet lemma 3-5 -veined. Companion sterile spikelets absent, or rudimentary; shorter than fertile. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 4-6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
    Male
    Male spikelets distinct from female; with pedicels fused to rhachis; 6-8.5 mm long. Male spikelet glumes 2. Male spikelet lemma 3-5 -veined.
    Distribution
    Asia-tropical: India, Indo-China, and Malesia.
    Reference
    Andropogoneae. Bor.

    Images

    Distribution

    Native to:

    Assam, Bangladesh, Cambodia, India, Jawa, Malaya, Myanmar, Nepal, Pakistan, Sri Lanka, Thailand, Vietnam, West Himalaya

    Polytoca gigantea (J.Koenig) Mabb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Apr 14, 1932 Röttler, J.P. [s.n.], India Chionachne koenigii K000246052 isotype
    Roxburgh, W. [s.n.], India Chionachne koenigii K000246053 isotype
    Roxburgh, W. [s.n.], India Chionachne koenigii K000246054 isotype
    Thwaites, G.H.K. [s.n.], Sri Lanka Chionachne koenigii K001057013
    Röttler, J.P. [78], India Chionachne koenigii K001057012
    s.coll. [Cat. no. 8626] Coix barbata K001131008
    s.coll. [Cat. no. 8626] Coix barbata K001131009
    s.coll. [Cat. no. 8624] Coix gigantea K001126000
    s.coll. [Cat. no. 8624] Coix gigantea K001131001
    s.coll. [Cat. no. 8624] Coix gigantea K001131002
    s.coll. [Cat. no. 8624], India Coix gigantea K001131003
    s.coll. [Cat. no. 8624], India Coix gigantea K001131004
    s.coll. [Cat. no. 8624] Coix gigantea K001131005
    s.coll. [Cat. no. 8624] Coix gigantea K001131006

    First published in Mabberley's Pl.-Book, ed. 4: 1102 (2017)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Kandwal, M.K. & Gupta, B.K. (2009). An update on grass flora of Uttarkhand Indian Journal of Forestry 32: 657-668.
    • Ahmed, Z.U. (ed.) (2008). Encyclopedia of Flora and Fauna of Bangladesh 12: 1-505. Asiatic Society of Bangladesh.
    • Press, J.R. et al. (2000). Annotated Checklist of the Flowering Plants of Nepal: i-x, 1-430. Natural History Museum, London.
    • Dassanayake (ed.) (1994). A Revised Handbook to the Flora of Ceylon 8: 1-458. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.
    • Cope, T.A. (1982). Flora of Pakistan 143: 1-678. Department of Botany, University of Karachi, Karachi.
    • 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.
    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