1. Family: Poaceae Barnhart
    1. Genus: Cenchrus L.
      1. Cenchrus palmeri Vasey

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

    [GB]
    Habit
    Annual; culms solitary. Culms 9-35 cm long. Leaf-sheaths puberulous; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 1.3-2.3 mm long. Leaf-blades 4.4-10 cm long; 3.8-6.8 mm wide. Leaf-blade surface puberulous.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; linear; 2-4.2 cm long. Primary panicle branches accrescent to a central axis; burrs 1-4 in number; with sessile scars on axis. Panicle axis angular; scaberulous; bearing deciduous spikelet clusters. Spikelets subtended by an involucre. Fertile spikelets sessile; 4-8 in the cluster. Involucre composed of bristles; connate into a cup below; globose; 11.5-18.5 mm long; base obconical. Involucral bristles deciduous with the fertile spikelets; numerous; emerging irregularly from body of a burr; 40-65 in principal whorl; 5.8-11 mm long; terete (dark coloured); rigid; retrorsely scaberulous; pubescent; spinose.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acuminate; 5.2-7.3 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; acuminate; 5.2-7.3 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume ovate; 4.5-6.4 mm long; 0.9 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 4.5-6.5 mm long; 0.9 length of spikelet; membranous; 5-7 -veined; acute. Fertile lemma ovate; 5.2-7.1 mm long; coriaceous; much thinner on margins; without keel; 3 -veined. Lemma margins flat. Lemma apex obtuse. Palea coriaceous.
    Flowers
    Anthers 1.7-2.1 mm long.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: Mexico.
    Reference
    Paniceae. De Lisle.

    Images

    Distribution

    Native to:

    Mexico Northwest

    Cenchrus palmeri Vasey appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Palmer, E. [689], Mexico K000643122
    Black, G.A. [54-16444], Brazil K001106077
    Black, A. [54/16444], Brazil K001106078

    First published in Proc. Calif. Acad. Sci., ser. 2, 2: 211 (1889)

    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.
    • 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.

    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