1. Family: Poaceae Barnhart
    1. Genus: Polypogon Desf.
      1. Polypogon imberbis (Phil.) Johow

        This species is accepted, and its native range is S. Brazil to S. South America.

    [GB]
    Habit
    Perennial; caespitose. Culms 15-80 cm long. Leaf-sheaths smooth, or antrorsely scabrous. Ligule an eciliate membrane; 2-5 mm long; scaberulous on abaxial surface. Leaf-blades flat, or convolute; 10-15 cm long; 2-8 mm wide. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear, or oblong; interrupted; 5-25 cm long. Primary panicle branches 0.5-5 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 1-3 mm long; scabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-4.5 mm long; falling entire; deciduous with the pedicel. Floret callus glabrous.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5-4.5 mm long; falling entire; deciduous with the pedicel. Floret callus glabrous.
    Glume
    Glumes similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 3.5-4.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute; awned; 1 -awned. Lower glume awn 1-2 mm long. Upper glume lanceolate; 3.5-4.5 mm long; 2.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex acute; awned; 1 -awned. Upper glume awn 1-2 mm long.
    Florets
    Fertile lemma oblong; 1.6-2 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 4 -fid; truncate; muticous, or mucronate. Principal lemma awn from a sinus. Palea 0.6-0.7 length of lemma; hyaline.
    Flowers
    Lodicules 2; 0.4 mm long; membranous. Anthers 3; 0.7-0.8 mm long.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 1.5 mm long. Endosperm soft.
    Distribution
    South America: southern South America.
    Reference
    Aveneae. Fl Pat.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Argentina South, Brazil South, Chile Central, Chile South, Juan Fernández Is., Uruguay

    Introduced into:

    California

    Polypogon imberbis (Phil.) Johow appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Pedersen, T.M. [s.n.], Brazil K001101199
    Saint-Hilaire, A. [C2/1831], Brazil K001101198

    First published in Estud. Fl. Juan Fernandez: 136 (1896)

    Accepted by

    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • 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
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.

    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