1. Family: Poaceae Barnhart
    1. Genus: Polytoca R.Br.
      1. Polytoca digitata (L.f.) Druce

        This species is accepted, and its native range is Assam to S. China and New Guinea.

    [GB]
    Habit
    Perennial. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms 100-150 cm long. Culm-nodes pubescent. Ligule a ciliolate membrane. Leaf-blades 45-60 cm long; 15-25 mm wide. Leaf-blade surface glabrous, or hirsute.
    Inflorescences
    Monoecious; with male terminal and mixed axillary inflorescences. Inflorescence composed of racemes; axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole lanceolate; herbaceous. Racemes 1; single; 3-8 cm long; bearing few fertile spikelets; bearing 3-6 fertile spikelets on each (and 0-10 male spikelets). Rhachis fragile at the nodes; subterete; pilose on surface. Rhachis internodes oblong; 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. Male inflorescence of subdigitate racemes. Male spikelets distinct from female; with pedicels fused to rhachis; 6-7 mm long. Male spikelet glumes 2; muticous.
    Spikelets
    Companion sterile spikelets represented by single glumes; lanceolate; 12-18 mm long; longer than fertile; separately deciduous. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 6-7 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
    Sterile
    Companion sterile spikelets represented by single glumes; lanceolate; 12-18 mm long; longer than fertile; separately deciduous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 6-7 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; much thinner above; pallid; 2-keeled; keeled above; winged on keel; winged above. Lower glume surface not waisted; villous; hairy below. Lower glume apex entire; obtuse. Upper glume elliptic; coriaceous. Upper glume apex acuminate.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; cartilaginous; acuminate. Fertile florets female. Fertile lemma oblong; hyaline; without keel. Lemma apex acuminate. Palea hyaline; without keels.
    Fruits
    Caryopsis with adherent pericarp; 7-8 mm long. Hilum punctiform.
    Male
    Male inflorescence of subdigitate racemes. Male spikelets distinct from female; with pedicels fused to rhachis; 6-7 mm long. Male spikelet glumes 2; muticous.
    Distribution
    Asia-temperate: China. Asia-tropical: India, Indo-China, Malesia, and Papuasia.
    Reference
    Andropogoneae. Bor.
    Diagnostic
    Male racemes stiff.

    Images

    Distribution

    Native to:

    Andaman Is., Assam, Bangladesh, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, Jawa, Malaya, Myanmar, New Guinea, Philippines, Thailand, Vietnam

    Polytoca digitata (L.f.) Druce appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    May 2, 2008 Kerr, A.F.G. [19605], Thailand K000648199
    May 2, 2008 Sorensen, Th. [2281], Thailand K000648198
    Jan 21, 2008 Kerr, A.F.G. [19605], Thailand K000620678
    Jan 21, 2008 Kerr, A.F.G. [1437], Thailand K000620679
    Jan 21, 2008 Kerr, A.F.G. [1437], Thailand K000620680
    Jan 21, 2008 Kerr, A.F.G. [8253], Thailand K000620681
    Jan 21, 2008 Kerr, A.F.G. [8253], Thailand K000620682
    Jan 21, 2008 Kerr, A.F.G. [2219], Thailand K000620683
    Jan 21, 2008 Kerr, A.F.G. [2226], Thailand K000620684
    Jan 21, 2008 Kerr, A.F.G. [6350], Thailand K000620685
    Jan 21, 2008 Sorensen, Th. [2312], Thailand K000648046
    Jan 21, 2008 van Beusekom, C.F. [1136], Thailand K000648045
    Jan 21, 2008 Geesink, R. [7103], Thailand K000648047
    Jan 21, 2008 Smitinand, T. [2635], Thailand K000648042
    Jan 21, 2008 Smitinand, T. [3954], Thailand K000648043
    Jan 21, 2008 Smitinand, T. [3994], Thailand K000648044
    Jan 21, 2008 Phloenchit [888], Thailand K000648040
    Jan 18, 2008 Kerr, A.F.G. [9784], Thailand K000620686
    Jan 18, 2008 Kerr, A.F.G. [13771], Thailand K000620687
    Jan 18, 2008 Kerr, A.F.G. [13771], Thailand K000620688
    Jan 18, 2008 Larsen, K. [2020], Thailand K000648039
    Jan 18, 2008 Smitinand, T. [1861], Thailand K000648041
    Jan 18, 2008 Marcan, A. [s.n.], Thailand K000620689
    s.coll. [Cat. no. 8627] Coix heteroclita K001131010
    s.coll. [Cat. no. 8627] Coix heteroclita K001131011
    s.coll. [Cat. no. 8627], India Coix heteroclita K001131012
    s.coll. [Cat. no. 8627] Coix heteroclita K001131013

    First published in Rep. Bot. Soc. Exch. Club Brit. Isles 1916: 641 (1917)

    Accepted by

    • Ahmed, Z.U. (ed.) (2008). Encyclopedia of Flora and Fauna of Bangladesh 12: 1-505. Asiatic Society of Bangladesh.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
    • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.

    Literature

    Kew Backbone Distributions
    • Ahmed, Z.U. (ed.) (2008). Encyclopedia of Flora and Fauna of Bangladesh 12: 1-505. Asiatic Society of Bangladesh.
    • Pandey, R.P. & Dilwakar, P.G. (2008). An integrated check-list flora of Andaman and Nicobar islands, India Journal of Economic and Taxonomic Botany 32: 403-500.
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Noltie, H.J. (2000). Flora of Bhutan 3(2): 457-883. Royal Botanic Gardens, Edinburgh.
    • Karthikeyan, S., Jain, S.K., Nayar, M.P. & Sanjappa, M. (1989). Florae Indicae Enumeratio: Monocotyledonae: 1-435. Botanical Survey of India, Calcutta.

    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