1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida pallens Cav.

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

    [GB]
    Habit
    Perennial. Culms 28-50 cm long. Lateral branches lacking. Leaf-sheath oral hairs lacking, or scanty. Ligule an eciliate membrane; 0.6-0.8 mm long. Collar glabrous. Leaf-blades straight; convolute; 8-14(-16) cm long; 0.5-0.9 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous, or pilose; hairless except near base; sparsely hairy; hairy adaxially. Leaf-blade apex acute; antrorsely scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open (erect,subcontracted); 14-16(-20) cm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; straight; 0.4-0.5(-0.6) mm long; pilose; obtuse.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; straight; 0.4-0.5(-0.6) mm long; pilose; obtuse.
    Glume
    Glumes persistent; dissimilar (lower shorter than upper). Lower glume lanceolate; 12-20(-27) mm long; 1 -veined. Lower glume primary vein scaberulous. Lower glume surface asperulous; rough generally. Lower glume apex setaceously attenuate. Upper glume lanceolate; 28-37(-40) mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; setaceously attenuate.
    Florets
    Fertile lemma subterete; 11-12 mm long; without keel; rounded except near apex; 3 -veined. Lemma surface smooth, or scaberulous; rough above; without grooves. Lemma margins convolute. Lemma apex awned; 3 -awned. Principal lemma awn straight; ascending; simple at base; with 65-100 mm long limb; without a column. Lateral lemma awns ascending; 65-100 mm long; subequal to principal.
    Distribution
    South America: Brazil and southern South America.
    Reference
    Aristideae. LO-W 1993.
    Diagnostic
    Culms grouped in fascicles. Lemma apex with an hyaline appendage 1-1.5mm.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Argentina South, Brazil South, Chile Central, Paraguay, Uruguay

    Aristida pallens Cav. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Smith, L.B. [15599], Brazil K001101357
    Smith, L.B. [13561], Brazil K001101358
    Smith, L.B. [15602], Brazil K001101359
    Klein, R.M. [12173], Brazil K001101356
    Valls, J. [2551], Brazil K001101355

    First published in Icon. 5: 43 (1799)

    Accepted by

    • Lezama, F. & Bonifacino, J.M. (2012). Sinopsis de Aristida (Poaceae) para Uruguay Boletín de la Sociedad Argentina de Botánica 47: 135-143.
    • 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/.
    • GBIF (2008- continuously updated). Global Biodiversity Information Facility http://www.gbif.org/.
    • 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

    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