1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus tristachyus (Kunth) Kuntze

        This species is accepted, and its native range is Venezuela to W. South America and NW. Argentina.

    [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. 1500 - 3000 m.; Andes.
    Habit
    Hierba
    Conservation
    No Evaluada
    [GB]
    Habit
    Perennial; caespitose. Culms erect; robust; 200-250 cm long; 3-6 mm diam. Culm-internodes distally glabrous. Culm-nodes pubescent. Lateral branches ample. Leaf-sheaths glabrous on surface. Ligule a ciliate membrane. Leaf-blades lanceolate; 20-35 cm long; 30 mm wide. Leaf-blade surface glabrous, or pubescent. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle; terminal and axillary. Panicle spiciform; linear; 5-15 cm long. Primary panicle branches accrescent to a central axis; with lateral stumps on axis. Panicle axis hispid; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; 8-12 mm long; base truncate. Involucral bristles deciduous with the fertile spikelets; numerous; in one whorl; with one conspicuously longer bristle; 20 mm long; terete; flexible; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute, or acuminate; 5.5-6.3 mm long; falling entire; deciduous with accessory branch structures.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute, or acuminate; 5.5-6.3 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1-1.5 mm long; 0.2-0.25 length of spikelet; membranous; without keels; 0-1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 2.5-3 mm long; 0.5 length of spikelet; membranous; without keels; 3 -veined. Upper glume lateral veins obscure. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret ovate; 5.5-6.3 mm long; 1 length of spikelet; membranous; acute. Fertile lemma ovate; 5-8 mm long; chartaceous; without keel. Lemma surface scaberulous; rough above. Lemma margins flat. Lemma apex acuminate. Palea 1 length of lemma; membranous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: northern South America, western South America, and southern South America.
    Reference
    Paniceae. Tovar Gr. Peru 2011.

    Images

    Distribution

    Native to:

    Argentina Northwest, Bolivia, Colombia, Ecuador, Peru, Venezuela

    Cenchrus tristachyus (Kunth) Kuntze appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Spruce, R. [0bis], Ecuador Pennisetum tristachyum K000201723
    Spruce, R. [s.n.], Ecuador Pennisetum tristachyum K000201724
    Spruce, R. [s.n.], Ecuador Pennisetum tristachyum K000201725

    First published in Revis. Gen. Pl. 3(2): 347 (1898)

    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 Pennisetum tristachyum.]

    Literature

    Kew Backbone Distributions
    • Gutiérrez, H.F. & Morrone, O. (2012). Novedades nomenclaturales en Cenchrus s.l. (Poaceae: Panicoideae: Paniceae) Boletín de la Sociedad Argentina de Botánica 47: 263-269.
    • 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.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Jørgensen, P.M. & León-Yánez, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador Monographs in Systematic Botany from the Missouri Botanical Garden 75: i-viii, 1-1181.
    • 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 2019. 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 2019. 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