1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida megapotamica Spreng.

        This species is accepted, and its native range is Central & S. Tropical America.

    [CPLC]

    Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

    Distribution
    Nativa en Colombia; Alt. 0 - 500 m.; Orinoquia.
    Habit
    Hierba
    Conservation
    No Evaluada
    [GB]
    Habit
    Perennial. Culms (37-)60-140 cm long. Lateral branches lacking. Leaf-sheath oral hairs lacking, or bearded. Ligule a fringe of hairs; 0.5-0.7 mm long. Collar glabrous. Leaf-blades curled (lower), or straight (upper); flat (lower), or convolute (upper); 20-50 cm long; 3-5 mm wide. Leaf-blade surface scabrous; rough on both sides, or adaxially; glabrous, or pilose; hairless throughout, or except near base; moderately hairy; hairy adaxially. Leaf-blade apex acute; antrorsely scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; 11-35(-40) cm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1-1.8(-2.5) mm long; bearded; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 1-1.8(-2.5) mm long; bearded; acute.
    Glume
    Glumes persistent; dissimilar (lower longer than upper). Lower glume lanceolate; (16-)20-33 mm long; 1 -veined. Lower glume primary vein scabrous. Lower glume surface scabrous; rough generally. Lower glume apex setaceously attenuate; awned. Upper glume lanceolate; 14 mm long, or 6-28 mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; setaceously attenuate; awned.
    Florets
    Fertile lemma subterete; (6-)8-12 mm long; without keel; rounded throughout; 3 -veined. Lemma surface scabrous, or scaberulous (rarely); rough above (upper 2/3); without grooves. Lemma margins convolute. Lemma apex awned; 3 -awned. Principal lemma awn straight, or flexuous; twisted together, or ascending; simple at base; with 25-55 mm long limb; with twisted column. Column of lemma awn (20-)25-60(-95) mm long. Lateral lemma awns ascending, or wrapped around principal; 22-48 mm long; shorter than principal.
    Distribution
    South America: Mesoamericana, western South America, Brazil, and southern South America.
    Reference
    Aristideae. Lo-W 1993.

    Images

    Distribution

    Native to:

    Argentina Northeast, Belize, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Colombia, El Salvador, Honduras, Paraguay, Peru, Uruguay

    Aristida megapotamica Spreng. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1993 Sellow [s.n.], Brazil K000308658
    Tweedie [s.n.], Brazil K000308655
    Riedel [2125], Brazil K000308656
    Morong, T. [488], Paraguay K000308657
    Pereira, E. [5279], Brazil Aristida implexa K001101323
    Campos, S.M. [227], Brazil Aristida implexa K001101322

    First published in Syst. Veg. 4(2): 31 (1827)

    Accepted by

    • Lezama, F. & Bonifacino, J.M. (2012). Sinopsis de Aristida (Poaceae) para Uruguay Boletín de la Sociedad Argentina de Botánica 47: 135-143.
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • 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.
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • 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.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    Sources

    Catálogo de Plantas y Líquenes de Colombia
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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