1. Family: Poaceae Barnhart
    1. Genus: Hyperthelia Clayton
      1. Hyperthelia edulis (C.E.Hubb.) Clayton

        This species is accepted, and its native range is South Sudan.

    [GB]
    Habit
    Annual. Culms 300-570 cm long; 4-9 mm diam.; with prop roots. Culm-nodes glabrous, or bearded. Leaf-sheaths glabrous on surface. Leaf-sheath auricles erect; 12-24 mm long. Ligule an eciliate membrane; 12-24 mm long; scarious; truncate. Leaf-blade base with a false petiole; petiole 5-16 cm long. Leaf-blades linear, or lanceolate; 50-100 cm long; 20-38 mm wide. Leaf-blade surface glabrous.
    Inflorescences
    Synflorescence compound; paniculate; 100-150 cm long. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole lanceolate; 6.5-10 cm long; scarious; purple; glabrous. Peduncle glabrous, or pilose above. Racemes 2; paired; deflexed, or spreading; 4.5-6 cm long; bearing few fertile spikelets; bearing 1 fertile spikelets on each. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes filiform. Rhachis internode tip oblique; flat. Raceme-bases filiform; unequal (the longer measured); 1-4 mm long; glabrous; extended into a flask-like appendage; with 15-20 mm long appendage. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; 4 mm long; ciliate; tip oblique.
    Sterile
    Basal sterile spikelets well-developed; lower raceme 2 in number; 0 in upper raceme; male; lanceolate; 25-30 mm long; equalling fertile. Basal sterile spikelet glumes glabrous; lower glume muticous. Companion sterile spikelets well-developed; male; lanceolate; 25-45 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet callus cuneate; 1 mm long; acute. Companion sterile spikelet glumes coriaceous; awned; one glume awned; with 5-10 mm long awn. Companion sterile spikelet lemmas 2; enclosed by glumes.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 25-35 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 8-10 mm long; bearded; base pungent; attached obliquely. Spikelet callus hairs white. Basal sterile spikelets well-developed; lower raceme 2 in number; 0 in upper raceme; male; lanceolate; 25-30 mm long; equalling fertile. Basal sterile spikelet glumes glabrous; lower glume muticous. Companion sterile spikelets well-developed; male; lanceolate; 25-45 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet callus cuneate; 1 mm long; acute. Companion sterile spikelet glumes coriaceous; awned; one glume awned; with 5-10 mm long awn. Companion sterile spikelet lemmas 2; enclosed by glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 25-35 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate; 8-10 mm long; bearded; base pungent; 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; 12-14 -veined. Lower glume surface with a longitudinal median groove; pubescent; hairy above. Lower glume apex dentate; 2 -fid. Upper glume oblong; coriaceous; without keels; 3 -veined. Upper glume awned; 1 -awned. Upper glume awn 1-10 mm long.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2 -veined; ciliate on margins. Fertile lemma linear; 10-14 mm long; hyaline; without keel; 3 -veined. Lemma margins ciliate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 90-140 mm long overall; with twisted column. Column of lemma awn hirtellous. Palea absent or minute.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 10 mm long.
    Distribution
    Africa: northeast tropical.
    Reference
    Andropogoneae. WDC.

    Images

    Distribution

    Hyperthelia edulis (C.E.Hubb.) Clayton appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Myers, J.G. [13533], Sudan K000280155 isotype
    Myers, J.G. [13533], Sudan K000280153 isotype
    Myers, J.G. [13533], Sudan K000280154 isotype
    Myers, J.G. [13533], Sudan K000280157 isotype
    Myers, J.G. [13533], Sudan K000280156 holotype

    First published in Kew Bull. 20: 447 (1966)

    Accepted by

    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, 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