1. Family: Poaceae Barnhart
    1. Genus: Polypogon Desf.
      1. Polypogon tenuis Brongn.

        This species is accepted, and its native range is Ascension, St. Helena, W. Namibia to Cape Prov.

    [GB]
    Habit
    Annual; caespitose. Culms erect; 7-70 cm long. Ligule an eciliate membrane. Leaf-blades 10-20 cm long; 1-5 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear, or lanceolate; 10-20 cm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 1.5-1.8 mm long; falling entire; deciduous from the base. Spikelet callus square; base obtuse. Floret callus glabrous.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 1.5-1.8 mm long; falling entire; deciduous from the base. Spikelet callus square; base obtuse. Floret callus glabrous.
    Glume
    Glumes similar; reaching apex of florets, or exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume oblong; 1.5-1.8 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex dentate; 2 -fid; awned; 1 -awned. Lower glume awn 10-25 mm long. Upper glume oblong; 1.5-1.8 mm long; 1-1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex dentate; 2 -fid; awned; 1 -awned. Upper glume awn 10-25 mm long.
    Florets
    Fertile lemma elliptic; 1.5 mm long; cartilaginous; shiny; without keel; 5 -veined. Lemma apex lobed; 2 -fid; incised 0.33 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; 5-10 mm long overall. Palea 1 length of lemma; hyaline; 2 -veined.
    Flowers
    Lodicules 2; membranous. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Africa: south and middle Atlantic ocean.
    Reference
    Aveneae. Chippindall.

    Images

    Distribution

    Native to:

    Ascension, Cape Provinces, Namibia, St.Helena

    Polypogon tenuis Brongn. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Drege [s.n.] Polypogon strictus K000367373
    Drege [s.n.] Polypogon strictus K000367374

    First published in L.I.Duperrey, Voy. Monde, Phan.: 22 (1829)

    Accepted by

    • Lambdon, P. (2012). Flowering plants & ferns of St Helena: 1-624. Pisces publications for St Helena nature conservation group.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Packer, J.E. (1974). Ascension Handbook. A concise guide to Ascension Island South Atlantic ed. 2 Packer, Georgetown.

    Literature

    Kew Backbone Distributions
    • Lambdon, P. (2012). Flowering plants & ferns of St Helena: 1-624. Pisces publications for St Helena nature conservation group.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
    • Packer, J.E. (1974). Ascension Handbook. A concise guide to Ascension Island South Atlantic ed. 2 Packer, Georgetown.

    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