1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus durus (Beal) Morrone

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

    [GB]
    Habit
    Perennial. Culms erect; 100-200 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Lateral branches sparse. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule a fringe of hairs; 1.5-2 mm long. Leaf-blades 30-60 cm long; 5-15 mm wide; glaucous. Leaf-blade surface scabrous; glabrous, or pubescent. Leaf-blade apex attenuate; filiform.
    Inflorescences
    Inflorescence a panicle; terminal and axillary. Peduncle scaberulous above. Panicle spiciform; linear; 3-10 cm long; 1 cm wide. Primary panicle branches accrescent to a central axis; with sessile scars 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; 4-6 mm long; base truncate. Involucral bristles deciduous with the fertile spikelets; numerous; with longest bristle scarcely emergent; terete; flexible; antrorsely scaberulous; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 6-7 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; 6-7 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.25 length of spikelet; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume margins ciliate. Lower glume apex obtuse. Upper glume ovate; 0.5 length of spikelet; membranous; without keels; 3-5 -veined. Upper glume surface smooth, or asperulous. Upper glume margins ciliolate. Upper glume apex obtuse.
    Florets
    Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret oblong; 1 length of spikelet; membranous; 5 -veined; concave across back; scaberulous; acuminate. Fertile lemma lanceolate; 6-7 mm long; coriaceous; without keel. Lemma surface asperulous. Lemma margins flat. Lemma apex acuminate. Palea 1 length of lemma; coriaceous.
    Flowers
    Lodicules absent. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: Mexico.
    Reference
    Paniceae. N Amer Fl 1994.

    Images

    Distribution

    Native to:

    Mexico Central, Mexico Northeast, Mexico Southwest

    Cenchrus durus (Beal) Morrone appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Pringle, C.G. [817], Chihuahua Pennisetum durum K000643109

    First published in Ann. Bot. (Oxford) 106: 128 (2010)

    Literature

    Kew Backbone Distributions
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    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