1. Family: Poaceae Barnhart
    1. Genus: Guadua Kunth
      1. Guadua chacoensis (Rojas Acosta) Londoño & P.M.Peterson

        This species is accepted, and its native range is Bolivia to S. Brazil and N. Argentina.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; inclined at the tip; 1000-2000 cm long; 8-15 mm diam.; woody; with root thorns from the nodes. Culm-internodes semiterete; thin-walled; mid-green. Lateral branches dendroid; intravaginal. Bud complement 1. Branch complement three, or several; thinner than stem. Culm-sheaths deciduous; 20-50 cm long; 1.7-2.5 times as long as wide; glabrous, or hispid; with tawny hairs; truncate at apex; without auricles; glabrous on shoulders. Culm-sheath ligule 0.8-1 mm high; ciliolate. Culm-sheath blade triangular; as wide as sheath at base; demarcated but persistent; erect; 4-13 cm long; 30-80 mm wide; glabrous on surface, or pubescent and with ciliate margins; acute. Leaves 7-9 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate; curly; 2-3 mm long; pale. Ligule a ciliolate membrane; 0.2-0.4 mm long; pubescent on abaxial surface. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long; petiole glabrous. Leaf-blades lanceolate; 10-24 cm long; 5-25 mm wide. Leaf-blade venation with 8-14 secondary veins. Leaf-blade surface glabrous, or hispid; sparsely hairy; hairy adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
    Inflorescences
    Synflorescence bractiferous; paniculate; 30-40 cm long; open; with glumaceous subtending bracts; bracts 8-10 mm long; with axillary buds at base of spikelet; prophyllate below lateral spikelets. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1-2 basal sterile florets; 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 20-50 mm long; 4-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 5-7 mm long; obscured by lemmas; pubescent.
    Fertile
    Spikelets comprising 1-2 basal sterile florets; 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 20-50 mm long; 4-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 5-7 mm long; obscured by lemmas; pubescent.
    Glume
    Glumes several; 1-2 empty glumes; persistent; similar; shorter than spikelet. Upper glume ovate; 5-8 mm long; without keels; 7-9 -veined. Upper glume apex acute; mucronate.
    Florets
    Basal sterile florets similar; barren; without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to upper glume; ovate; 10-14 mm long; puberulous; obtuse; mucronate. Fertile lemma ovate; 12-16 mm long; 7-12 mm wide; coriaceous; shiny; without keel; 12-17 -veined. Lemma surface puberulous; hairy below. Lemma margins convolute; covering most of palea. Lemma apex obtuse; mucronate, or awned. Principal lemma awn 0.8-1 mm long overall. Palea 6-14 mm long; 11 -veined. Palea keels winged; conspicuously winged. Palea surface pubescent. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; 3-5 mm long; veined; ciliate. Anthers 6; 5-8 mm long; anther tip apiculate. Stigmas 3.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 9-12 mm long; light brown. Embryo 0.5 length of caryopsis.
    Distribution
    South America: western South America, Brazil, and southern South America.
    Reference
    Bambuseae. Lond & Pet 1996.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Bolivia, Brazil South, Brazil West-Central, Paraguay

    Guadua chacoensis (Rojas Acosta) Londoño & P.M.Peterson appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jul 1, 2004 Perez, G. [GP4], Bolivia K000743055
    Jul 1, 2003 Davidse, G. [11233], Brazil K000947798
    Jul 1, 2003 Quarín, C. [2384], Argentina K000433083 isoneotype
    Jul 1, 2003 Quarín, C. [2384], Argentina K000433084 isoneotype
    Perez, G. [GP2], Bolivia K000743054

    First published in Novon 2: 41 (1992)

    Accepted by

    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.

    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