1. Family: Poaceae Barnhart
    1. Genus: Arthrostylidium Rupr.
      1. Arthrostylidium simpliciusculum (Pilg.) McClure

        This species is accepted, and its native range is W. South America to Brazil (Amazonas).

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms leaning; slender; 1000-1200 cm long; woody. Culm-internodes terete; thick-walled. Lateral branches dendroid. Branch complement many; in a clump; subtended by a bare patch above the node. Ligule a ciliolate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.1-0.15 cm long. Leaf-blades deciduous at the ligule; lanceolate; 5-10 cm long; 5-11 mm wide.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; bilateral; 7-12 cm long; bearing few fertile spikelets; bearing 4-7 fertile spikelets on each. Spikelet packing broadside to rhachis. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 45-60 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 45-60 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5-6 mm long; 0.66 length of upper glume; chartaceous; without keels. Lower glume apex acute. Upper glume lanceolate; 8-9 mm long; 0.9 length of adjacent fertile lemma; chartaceous; without keels. Upper glume apex acute.
    Florets
    Fertile lemma elliptic; 9-11 mm long; chartaceous; without keel. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1.5-3 mm long overall. Palea 1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3. Anthers 3. Stigmas 2. Ovary umbonate.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: western South America and Brazil.
    Reference
    Bambuseae. Gr Peru 1997.

    Images

    Distribution

    Native to:

    Brazil North, Colombia, Ecuador, Peru

    Arthrostylidium simpliciusculum (Pilg.) McClure appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 2006 Ule, E. [8813], Amazonas K000433124 isotype
    Jan 1, 1989 Kubitzki, K. [190], Brazil K000947850
    Jan 1, 1989 Kubitzki, K. [210], Brazil K000947851
    Kubitzki, K. [210], Brazil K000947849

    First published in Smithsonian Contr. Bot. 9: 20 (1973)

    Accepted by

    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • 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.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • 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

    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 2018. 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 2018. 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