1. Family: Poaceae Barnhart
    1. Genus: Atractantha McClure
      1. Atractantha amazonica Judz. & L.G.Clark

        This species is accepted, and its native range is SE. Colombia to Venezuela and N. Brazil.

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Rhizomes short; pachymorph. Culms scandent; pendulous at the tip; 600 cm long; 40-80 mm diam.; woody. Culm-internodes terete; thick-walled; smooth; distally glabrous. Lateral branches dendroid. Bud complement 1. Branch complement many; thinner than stem. Culm-sheaths deciduous but leaving a persistent girdle; 7-9 cm long; 4 times as long as wide; glabrous; glabrous on shoulders. Culm-sheath ligule 0.2-0.3 mm high. Culm-sheath blade triangular; as wide as sheath at base; demarcated but persistent; erect; 3-5 cm long; 14-16 mm wide; acute. Leaves 5-9 per branch. Leaf-sheaths keeled (above); glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate; 3-6 mm long; dark (brown). Ligule an eciliate membrane; 0.5 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long; petiole glabrous. Leaf-blades lanceolate; 10-17 cm long; 10-14 mm wide. Leaf-blade venation without cross veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes; terminal. Peduncle 5-13 cm long. Racemes 1; single; 7-15 cm long; bearing 8-13 fertile spikelets on each. Rhachis glabrous on surface. Spikelets appressed, or ascending. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension, or with diminished florets at the apex. Spikelets linear, or lanceolate; subterete; 20-28 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes and elongated below proximal fertile floret. Rhachilla elongation 1 mm long (between glumes), or 2-3.5 mm long (below floret).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension, or with a barren rhachilla extension, or with diminished florets at the apex. Spikelets linear, or lanceolate; subterete; 20-28 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes and elongated below proximal fertile floret. Rhachilla elongation 1 mm long (between glumes), or 2-3.5 mm long (below floret).
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume elliptic; 4.5-5.5 mm long; membranous; without keels; keel-less throughout; 5 -veined. Lower glume apex awned; 1 -awned. Lower glume awn 1.5-3.5 mm long. Upper glume lanceolate; 6-7 mm long; membranous; without keels; keel-less except near apex; 7 -veined. Upper glume mucronate, or awned; 1 -awned. Upper glume awn 1-3 mm long.
    Florets
    Fertile lemma lanceolate; subterete; 18-23 mm long; 1.2-2 mm wide; coriaceous; without keel; 7-11 -veined. Lemma margins convolute; covering most of palea; ciliolate. Lemma apex acuminate; pungent, or awned; 1 -awned. Principal lemma awn 1-3 mm long overall. Palea tightly convolute around flower; coriaceous; 4 -veined. Palea keels approximate; ciliolate. Rhachilla extension 10-20 mm long. Apical sterile florets 1 in number; lanceolate; 1-1.5 mm long.
    Flowers
    Lodicules absent. Anthers 3; 4-10 mm long. Stigmas 2. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: northern South America and Brazil.
    Reference
    Bambuseae. Judziewicz 2000.
    [CPLC]

    Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

    Distribution
    Nativa en Colombia; Alt. 0 - 500 m.; Guayana y Serranía de La Macarena.
    Habit
    Hierba
    Conservation
    No Evaluada

    Images

    Distribution

    Native to:

    Brazil North, Colombia, Venezuela

    Atractantha amazonica Judz. & L.G.Clark appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Kubitzki, K. [79-222], Amazonas K000433095 isotype
    Kubitzki, K. [79-222], Amazonas K000433096 isotype

    First published in Novon 1: 78 (1991)

    Accepted by

    • Bernal, R., Gradstein, R.S. & Celis, M. (eds.) (2016). Catálogo de plantas y líquenes de Colombia 1-2: 1-3068. Libro impreso.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Bernal, R., Gradstein, R.S. & Celis, M. (eds.) (2016). Catálogo de plantas y líquenes de Colombia 1-2: 1-3068. Libro impreso.
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.

    Sources

    Catálogo de Plantas y Líquenes de Colombia
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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 2020. 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 2020. 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