1. Family: Poaceae Barnhart
    1. Genus: Polytoca R.Br.
      1. Polytoca hubbardiana (Henrard) Mabb.

        This species is accepted, and its native range is E. Jawa to N. Australia.

    [GB]
    Habit
    Annual. Culms erect; robust; 30-100 cm long. Culm-internodes channelled; distally hispid. Culm-nodes bearded. Lateral branches ample. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a ciliolate membrane; 2 mm long. Leaf-blade base broadly rounded. Leaf-blades 15-40 cm long; 5-15 mm wide. Leaf-blade margins cartilaginous; spinulose. Leaf-blade apex acuminate.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Synflorescence compound. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole. Spatheole lanceolate; 4-6 cm long. Peduncle widened at apex. Racemes 1; single; 3-5 cm long; bearing few fertile spikelets; bearing 5-6 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes linear; 5 mm long; bearing a sterile companion laterally. Rhachis internode tip transverse; crateriform. Sexes segregated; on bisexual branches; with male above; with 2-6 male spikelets per branch. 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 of companion sterile spikelets fused to internode; united wholly.
    Sterile
    Companion sterile spikelets rudimentary; 1 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 9-11 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 ovate; 9-11 mm long; 1 length of spikelet; indurate; pallid; 2-keeled; keeled above; keeled laterally; winged on keel; winged broadly; winged above. Lower glume surface not waisted. Lower glume apex emarginate. Upper glume ovate; cartilaginous. Upper glume apex cuspidate.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret ovate; hyaline. Fertile florets female. Fertile lemma lanceolate; hyaline; without keel; 3 -veined. Lemma apex acute. Palea 1 length of lemma; hyaline.
    Flowers
    Anthers 3; 2 mm long.
    Spikelets
    Male spikelets distinct from female; with pedicels fused to rhachis; 2 flowered; lanceolate; 7 mm long. Male spikelet glumes 2. Companion sterile spikelets rudimentary; 1 mm long. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 9-11 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; 2 flowered; lanceolate; 7 mm long. Male spikelet glumes 2.
    Distribution
    Asia-tropical: Malesia. Australasia: Australia.
    Reference
    Andropogoneae. Henrard.

    Images

    Distribution

    Native to:

    Jawa, Lesser Sunda Is., Northern Territory, Queensland, Western Australia

    Polytoca hubbardiana (Henrard) Mabb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 1, 1938 Berney, F.L. [40], Queensland Chionachne hubbardiana K001057008
    Feb 1, 1938 Mueller, F.J.H. von [s.n.], Northern Territory Chionachne hubbardiana K001057006 Unknown type material
    Gregory, A.C. [s.n.], Northern Territory Chionachne hubbardiana K001057007

    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.

    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