1. Family: Poaceae Barnhart
    1. Genus: Heteropholis C.E.Hubb.
      1. Heteropholis nigrescens (Thwaites) C.E.Hubb.

        This species is accepted, and its native range is Sri Lanka.

    [GB]
    Habit
    Annual. Culms decumbent; 30-150 cm long; 10-15 -noded; rooting from lower nodes. Culm-nodes glabrous. Leaf-sheaths outer margin hairy. Ligule an eciliate membrane. Leaf-blade base cordate. Leaf-blades lanceolate; 6-15 cm long; 5-11 mm wide. Leaf-blade margins ciliate; hairy at base.
    Inflorescences
    Inflorescence composed of racemes; terminal and axillary. Peduncle 3-5 cm long; widened at apex. Racemes 1; single; smoothly terete; unilateral; 5-8 cm long; bearing 6-10 fertile spikelets on each. Rhachis fragile at the nodes; semiterete. Rhachis internodes cuneate; 3-4 mm long. Rhachis internode tip transverse; crateriform; with simple rim. Spikelets sunken; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels fused to internode; united wholly; oblong; flattened; tip rectangular.
    Sterile
    Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; lanceolate; 4-5 mm long; longer than fertile; separately deciduous. Companion sterile spikelet glumes coriaceous; winged on keels.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous; base truncate; with central peg; attached transversely. Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas; lanceolate; 4-5 mm long; longer than fertile; separately deciduous. Companion sterile spikelet glumes coriaceous; winged on keels.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous; base truncate; with central peg; attached transversely.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; coriaceous; 2-keeled; keeled laterally; keeled obtusely; winged on keel; winged near apex; 11 -veined. Lower glume surface areolate. Lower glume margins ciliolate (below). Upper glume oblong; membranous; without keels. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile lemma oblong; hyaline; without keel.
    Flowers
    Anthers 3; 2 mm long.
    Distribution
    Asia-tropical: India.
    Reference
    Andropogoneae. WDC.

    Images

    Distribution

    Native to:

    Sri Lanka

    Heteropholis nigrescens (Thwaites) C.E.Hubb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Thwaites, G.H.K. [s.n.], Sri Lanka K000246035 isotype

    First published in Hooker's Icon. Pl. 36: t. 3548, p. 4 (1956)

    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.
    • Dassanayake (ed.) (1994). A Revised Handbook to the Flora of Ceylon 8: 1-458. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.

    Literature

    Kew Backbone Distributions
    • Dassanayake (ed.) (1994). A Revised Handbook to the Flora of Ceylon 8: 1-458. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, 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