1. Family: Poaceae Barnhart
    1. Genus: Amphibromus Nees
      1. Amphibromus scabrivalvis (Trin.) Swallen

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

    [GB]
    Habit
    Perennial. Rhizomes elongated. Butt sheaths thickened and forming a bulb. Culms erect; 40-100 cm long. Ligule an eciliate membrane; 6-12 mm long; lacerate. Leaf-blades 2-5 mm wide. Leaf-blade surface smooth, or scabrous.
    Inflorescences
    Inflorescence a panicle; embraced at base by subtending leaf. Panicle open; lanceolate; 10-25 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 14-22 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; pilose. Floret callus pubescent; disarticulating obliquely.
    Fertile
    Spikelets comprising 3-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 14-22 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; pilose. Floret callus pubescent; disarticulating obliquely.
    Glume
    Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 3-5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1-3 -veined. Lower glume lateral veins absent, or distinct. Lower glume apex acute. Upper glume lanceolate; 4-7 mm long; 0.5-1 length of adjacent fertile lemma; membranous; 1-keeled; 5-7 -veined. Upper glume apex acute.
    Florets
    Fertile lemma elliptic; 7 mm long; cartilaginous; without keel; 7-9 -veined. Lemma surface pubescent. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 13-15 mm long overall; with twisted column. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 2-2.7 mm long; eventually exserted, or retained within floret. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; 2.5-3.5 mm long; hairy at apex. Hilum linear.
    Cleistogene
    Cleistogenes absent, or present; in upper sheaths, or in lower sheaths.
    Distribution
    South America: western South America and southern South America.
    Reference
    Aveneae. Fl Pat 1995.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina South, Bolivia, Brazil South, Chile Central, Chile South, Uruguay

    Introduced into:

    Louisiana

    Amphibromus scabrivalvis (Trin.) Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Gillies [683], Argentina Helictotrichon scabrivalve K000433970
    Gillies [s.n.], Argentina Helictotrichon scabrivalve K000433971

    First published in Amer. J. Bot. 18: 413 (1931)

    Not 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. [Cited as Helictotrichon scabrivalve.]
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew. [Cited as Helictotrichon scabrivalve.]

    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.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. 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 2018. 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 2018. 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