1. Family: Poaceae Barnhart
    1. Genus: Polytoca R.Br.
      1. Polytoca javanica Henrard

        This species is accepted, and its native range is E. Jawa to Lesser Sunda Islands.

    [GB]
    Habit
    Annual. Culms erect; robust; 100-200 cm long. Culm-internodes terete; 10 cm long; distally glabrous. Lateral branches ample. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blade base with a false petiole; petiole 2 cm long. Leaf-blades lanceolate, or oblong; 10 cm long; 30 mm wide. Leaf-blade surface glabrous. Leaf-blade margins undulate.
    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. Racemes 1; single; 2-3 cm long; bearing few fertile spikelets; bearing 2-3 fertile spikelets on each. 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; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 0-1 in the cluster. Male spikelets sessile and pedicelled; 2-3 in a cluster. Pedicels fused to internode; united wholly.
    Sterile
    Companion sterile spikelets rudimentary; shorter than fertile.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 7 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus 1 mm long; base truncate; with central peg; attached transversely.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; coriaceous; without keels; keel-less except near apex. Lower glume surface not waisted. Lower glume apex obtuse, or acute. Upper glume lanceolate; coriaceous; without keels; 3-5 -veined. Upper glume lateral veins obscure. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; membranous. Fertile florets female. Fertile lemma lanceolate; hyaline; without keel. Palea hyaline; without keels.
    Flowers
    Lodicules absent.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Spikelets
    Male spikelets distinct from female; with pedicels fused to rhachis; 4-5 mm long; glabrous. Male spikelet glumes 2. Companion sterile spikelets rudimentary; shorter than fertile. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 7 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus 1 mm long; base truncate; with central peg; attached transversely.
    Male
    Male spikelets distinct from female; with pedicels fused to rhachis; 4-5 mm long; glabrous. Male spikelet glumes 2.
    Distribution
    Asia-tropical: Malesia.
    Reference
    Andropogoneae. Fl Java 1997.

    Images

    Distribution

    Native to:

    Jawa, Lesser Sunda Is.

    Polytoca javanica Henrard appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Backer, C.A. [36799], Jawa Chionachne javanica K000290029 isotype
    Schmutz, E. [6747], Indonesia Chionachne javanica K000458342
    Schmutz, E. [6747], Indonesia Chionachne javanica K000458343

    First published in Blumea 3: 241 (1939)

    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 javanica.]

    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