1. Family: Poaceae Barnhart
    1. Genus: Dinebra Jacq.
      1. Dinebra somalensis (Stapf) P.M.Peterson & N.Snow

        This species is accepted, and its native range is NE. & E. Tropical Africa, Arabian Peninsula.

    [FTEA]

    Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

    Habit
    Annual; culms prostrate, spreading, sometimes rooting at the nodes, much branched, flowering on the ascending lateral branches, these 5–15 cm. high.
    Leaves
    Leaf-blades 1.5–9.5 cm. long, 2.5–4.5 mm. wide, acute, blades and sheaths papillose-hispid; ligule 0.7–1 mm. long.
    Inflorescences
    Inflorescence often subcapitate, composed of 2–6 spikes on a central axis 0.3–3 cm. long; spikes oblong to broadly ovate, 0.7–1.7 cm. long, spreading, becoming reflexed.
    Spikelets
    Spikelets 5–9-flowered, broadly oblong to wedge-shaped, 6–11 mm. long, pale yellow-green with dark green upper glumes and lemma-nerves; lower glume 1–5-nerved, lanceolate-oblong to narrowly lanceolate in profile, 2.9–4 mm. long, acute and mucronate; upper glume 11–17-nerved, lanceolate-oblong, 5–8 mm. long, half as long to longer than the spikelet, sharply acuminate; lemmas 5–7-nerved, obliquely ovate in profile, 4–7 mm. long, silky villous on the lower half of the keel and margins, often also on the back towards the base, marginal nerves variable in length, the outermost often very short and weakly developed, tip cuspidate or mucronate; palea-keels gibbous, broadly winged; anthers 0.4–1.2 mm. long.
    Fruits
    Grain narrowly elliptic-oblong, 1.2–1.6 mm. long.
    Figures
    Fig. 58.
    Habitat
    A pioneer grass of bare ground mainly on silty (often alluvial), seasonally flooded soils, sometimes locally dominant and forming a thin open cover; sea-level to 1700 m.
    Distribution
    K1 K4 K6 K7 T2 T3
    [GB]
    Habit
    Annual; mat forming. Stolons present. Culms prostrate; 5-15 cm long; without nodal roots, or rooting from lower nodes. Ligule an eciliate membrane; 0.7-1 mm long; lacerate; truncate. Leaf-blades 1.5-9.5 cm long; 2.5-4.5 mm wide. Leaf-blade surface hispid; sparsely hairy. Leaf-blade apex acute.
    Inflorescences
    Inflorescence composed of racemes. Racemes 2-6; borne along a central axis; closely spaced; not compacted, or in a head; deflexed, or spreading; oblong to ovate; unilateral; 0.7-1.7 cm long. Central inflorescence axis 0.3-3 cm long. Rhachis deciduous from axis; flattened. Spikelet packing broadside to rhachis; crowded; regular; 2 -rowed. Spikelets spreading; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 5-9 fertile florets; with diminished florets at the apex. Spikelets oblong, or cuneate; laterally compressed; compressed strongly; 6-11 mm long; falling entire; deciduous with accessory branch structures; readily shedding fertile florets. Rhachilla internodes suppressed between florets.
    Fertile
    Spikelets comprising 5-9 fertile florets; with diminished florets at the apex. Spikelets oblong, or cuneate; laterally compressed; compressed strongly; 6-11 mm long; falling entire; deciduous with accessory branch structures; readily shedding fertile florets. Rhachilla internodes suppressed between florets.
    Glume
    Glumes dissimilar; exceeding apex of florets, or reaching apex of florets, or shorter than spikelet; recurved at apex. Lower glume lanceolate; 2.9-4 mm long; 0.5 length of upper glume; chartaceous; 1-keeled; 1-5 -veined. Lower glume apex acute; mucronate. Upper glume lanceolate; 5-8 mm long; 1.2-1.3 length of adjacent fertile lemma; 1-keeled; 11-17 -veined. Upper glume lateral veins ribbed. Upper glume apex acuminate.
    Florets
    Fertile lemma ovate in profile; 4-7 mm long; chartaceous; keeled; 5-7 -veined. Lemma midvein pubescent; hairy below. Lemma margins pubescent; hairy below. Lemma apex acute; muticous, or mucronate. Palea bowed outwards; 2 -veined. Palea keels winged. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; oblong; 0.4-1.2 mm long.
    Fruits
    Caryopsis with tardily free pericarp; ellipsoid; isodiametric; trigonous; 1.2-1.6 mm long. Embryo 0.4-0.5 length of caryopsis. Hilum punctiform.
    Distribution
    Africa: northeast tropical and east tropical. Asia-temperate: Arabia.
    Reference
    Eragrostideae. WDC.

    Images

    Distribution

    Native to:

    Djibouti, Ethiopia, Kenya, Saudi Arabia, Somalia, Sudan, Tanzania

    Dinebra somalensis (Stapf) P.M.Peterson & N.Snow appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Drake-Brockman, R.E. [647], Somalia Drake-brockmania somalensis K000366530 Unknown type material
    Drake-Brockman, R.E. [616], Somalia Drake-brockmania somalensis K000366531
    Drake-Brockman, R.E. [646], Somalia Drake-brockmania somalensis K000366532
    Drake-Brockman, R.E. [617 (2)], Somalia Drake-brockmania somalensis K000366533

    First published in Ann. Bot. (Oxford) 109: 1326 (2012)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Cope, T.A., Knees, S.G. & Miller, A.G. (2007). Flora of the Arabian peninsula and Socotra 5(1): 1-387. Edinburgh University Press.
    • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Audru, J., Cesar, J. & Lebrun, J.-P. (1993). Les Plantes Vasculaires de la République de Djibouti. Flore Illustrée 2(2): 433-968. CIRAD, Départerment d'Elevage et de Médecine vétérinaire, Djibouti.
    • Clayton, W.D., Phillips, S.M., Renvoize, S.A. (1974). Gramineae Flora of Tropical East Africa 2: 177-449.

    Sources

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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