1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus complanatus (Nees) Morrone

        This species is accepted, and its native range is Mexico (Veracruz) to Central America.

    [GB]
    Habit
    Perennial. Rhizomes elongated. Culms geniculately ascending, or decumbent; 75-200 cm long; 2-3 mm diam.; without nodal roots, or rooting from lower nodes. Culm-nodes glabrous, or pubescent. Lateral branches ample; arising from lower culm and mid culm. Leaf-sheaths longer than adjacent culm internode; outer margin glabrous, or hairy. Ligule a fringe of hairs; 1-1.6 mm long. Leaf-blades flat, or conduplicate; 15-55 cm long; 3-7 mm wide. Leaf-blade surface scabrous; glabrous; hairless except near base.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear, or oblong; 8-12 cm long; 0.7-1 cm wide. Primary panicle branches accrescent to a central axis; with lateral stumps on axis. Panicle axis angular; scabrous; with scattered hairs; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; oblong; 8-12 mm long; base obtuse; base 0.7 mm long. Involucral bristles deciduous with the fertile spikelets; numerous; with an outer whorl of thinner bristles; inner bristles longer than outer; with one conspicuously longer bristle; 10-15 mm long; terete; flexible; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 5-6 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; 5-6 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate, or orbicular; 0.33 length of spikelet; 0-1 -veined. Lower glume lateral veins absent. Upper glume ovate; 3.8-4.6 mm long; 0.75 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 7 -veined; acute. Fertile lemma ovate; 4.4-5.7 mm long; chartaceous; without keel; 5 -veined. Lemma margins flat. Lemma apex acute. Palea chartaceous.
    Flowers
    Lodicules absent. Anthers 3; 2.4-3.6 mm long; orange. Styles connate below.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Pacific: north-central. North America: Mexico. South America: Mesoamericana.
    Reference
    Paniceae. Fl Costa Rica 1993.

    Images

    Distribution

    Native to:

    Costa Rica, El Salvador, Guatemala, Honduras, Mexico Gulf, Nicaragua, Panamá

    Introduced into:

    Hawaii

    Cenchrus complanatus (Nees) Morrone appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Bourgeau, E. [3139], Mexico Pennisetum complanatum K000643110
    Bourgeau, E. [3139], Mexico Pennisetum complanatum K000643111
    Seemann [s.n.], Panama Pennisetum complanatum K000643092
    Seemann [1560], Panama Pennisetum complanatum K000643093 Unknown type material
    Müller, F. [2015], Mexico Pennisetum complanatum K000643112
    Müller, F. [2015], Mexico Pennisetum complanatum K000643113

    First published in Ann. Bot. (Oxford) 106: 127 (2010)

    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.
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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 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