1. Family: Poaceae Barnhart
    1. Genus: Danthonia DC.
      1. Danthonia rhizomata Swallen

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

    [GB]
    Habit
    Perennial. Rhizomes elongated. Culms erect; 35-45 cm long. Leaf-sheaths pilose; with simple hairs, or tubercle-based hairs. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 1 mm long. Leaf-blades flat, or convolute; 7-12 cm long; 1-3 mm wide. Leaf-blade surface pilose; with tubercle-based hairs.
    Inflorescences
    Inflorescence a panicle; comprising 1-4 fertile spikelets. Panicle open; ovate; 2.5-3 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets pedicelled. Pedicels puberulous.
    Spikelets
    Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose. Floret callus hairs 3-4 mm long.
    Fertile
    Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 15-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose. Floret callus hairs 3-4 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 15-25 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 15-25 mm long; 1.2-2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex acuminate.
    Florets
    Fertile lemma oblong; 12 mm long; chartaceous; shiny; without keel; 9 -veined. Lemma surface glabrous; with marginal hair tufts; bearing 4 hair tufts in all. Lemma hairs 1.5-2 mm long. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; simple at base; 14-16 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 4-5 mm long. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; cuneate; fleshy; glabrous; truncate. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: Brazil and southern South America.
    Reference
    Arundineae. Swallen 1993.

    Distribution

    Native to:

    Brazil South, Uruguay

    Danthonia rhizomata Swallen appears in other Kew resources:

    First published in Comun. Bot. Mus. Hist. Nat. Montevideo 3(39): 2 (1961)

    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.
    • 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.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/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