1. Family: Poaceae Barnhart
    1. Genus: Hyperthelia Clayton
      1. Hyperthelia colobantha Clayton

        This species is accepted, and its native range is Central African Republic.

    [GB]
    Habit
    Annual; caespitose. Culms erect; 200 cm long; 3-4 mm diam. Leaf-sheaths hirsute. Ligule an eciliate membrane; 1-2 mm long. Leaf-blades 20-45 cm long; 2-3 mm wide. Leaf-blade surface pilose; sparsely hairy.
    Inflorescences
    Synflorescence compound; linear; 20 cm long. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole lanceolate; 2.5 cm long; scarious; hirsute. Peduncle 0.2 cm long; pilose above. Racemes 2; paired; with abortive upper raceme represented by a single sterile spikelet; 1.2 cm long; bearing few fertile spikelets; bearing 1 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes linear. Rhachis internode tip oblique; flat. Raceme-bases filiform; unequal (the longer measured); 6-7 mm long; pilose; extended into an oblong appendage; with 6 mm long appendage. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; ciliate; tip rectangular.
    Spikelets
    Basal sterile spikelets well-developed; lower raceme 2 in number; 0 in upper raceme; male; linear; 8 mm long; smaller than fertile. Basal sterile spikelet lower glume muticous. Companion sterile spikelets well-developed; male; lanceolate; 9 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet callus cuneate; 0.5 mm long; acute. Companion sterile spikelet glumes coriaceous; muticous. Companion sterile spikelet lemmas 2; enclosed by glumes. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 9 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 2 mm long; pilose; base acute; attached obliquely. Spikelet callus hairs white.
    Sterile
    Basal sterile spikelets well-developed; lower raceme 2 in number; 0 in upper raceme; male; linear; 8 mm long; smaller than fertile. Basal sterile spikelet lower glume muticous. Companion sterile spikelets well-developed; male; lanceolate; 9 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet callus cuneate; 0.5 mm long; acute. Companion sterile spikelet glumes coriaceous; muticous. Companion sterile spikelet lemmas 2; enclosed by glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 9 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 2 mm long; pilose; base acute; attached obliquely. Spikelet callus hairs white.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; much thinner above; without keels. Lower glume surface with a longitudinal median groove; pubescent; hairy above. Lower glume apex dentate; 2 -fid; setaceously attenuate. Upper glume oblong; coriaceous; without keels; 3 -veined. Upper glume apex acute; mucronate.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2 -veined. Fertile lemma linear; 4.5 mm long; hyaline; without keel; 3 -veined. Lemma apex dentate; 2 -fid; incised 0.15 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 80 mm long overall; with twisted column. Column of lemma awn pubescent. Palea absent or minute.
    Distribution
    Africa: west-central tropical.
    Reference
    Andropogoneae. WDC.

    Images

    Distribution

    Native to:

    Central African Repu

    Hyperthelia colobantha Clayton appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 1, 1966 Clair [16], Central African Republic K000280145 holotype

    First published in Kew Bull. 20: 439 (1966)

    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.

    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