1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus annuus (Mez) Morrone

        This species is accepted, and its native range is Peru.

    [GB]
    Habit
    Annual. Culms slender; 30-70 cm long. Culm-nodes glabrous. Ligule a fringe of hairs. Leaf-blades lanceolate; 6-20 cm long; 5-10 mm wide. Leaf-blade surface scabrous.
    Inflorescences
    Inflorescence a panicle; terminal and axillary. Panicle spiciform; elliptic; 2.5-3 cm long. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis with rounded ribs; glabrous; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 1(-2) in the cluster. Involucre composed of bristles; 2.5 mm long; base truncate. Involucral bristles deciduous with the fertile spikelets; numerous; with one conspicuously longer bristle; 11-12 mm long; terete; flexible; antrorsely scaberulous; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.25 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret oblong; 1 length of spikelet; membranous; 5 -veined; acute. Fertile lemma lanceolate; 5 mm long; coriaceous; without keel. Lemma margins flat. Lemma apex acute. Palea 1 length of lemma; coriaceous.
    Flowers
    Lodicules absent. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: western South America.
    Reference
    Paniceae. Turpe 1994.

    Images

    Distribution

    Cenchrus annuus (Mez) Morrone appears in other Kew resources:

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

    Literature

    Kew Backbone Distributions
    • 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

    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 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

    Kew Science Photographs
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/