1. Family: Poaceae Barnhart
    1. Genus: Arberella Soderstr. & C.E.Calderón
      1. Arberella flaccida (Döll) Soderstr. & C.E.Calderón

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

    [GB]
    Habit
    Perennial; caespitose. Culms geniculately ascending; 15-27 cm long; 3-4 -noded. Culm-internodes solid. Culm-nodes constricted. Lateral branches lacking. Leaves cauline; 5-8 per branch. Leaf-sheaths ribbed. Ligule a ciliolate membrane; 0.4-0.6 mm long; truncate. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.1 cm long; petiole glabrous. Leaf-blades lanceolate, or ovate; 4-5 cm long; 8-10 mm wide. Leaf-blade surface glabrous. Leaf-blade margins ciliate. Leaf-blade apex acute.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence (or some all male). Inflorescence a panicle; comprising 1 fertile spikelets (and 5-8 male); terminal and axillary. Axillary inflorescences present throughout the plant. Panicle open; linear; 4-5 cm long; bearing few spikelets. Sexes segregated; on unisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled; 1-2 in a cluster. Pedicels clavate (female), or linear (male).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or obovate; dorsally compressed; 8.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; truncate.
    Glume
    Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma; incurved at apex. Lower glume elliptic; 8.5 mm long; 1.05 length of upper glume; membranous; pallid; without keels; 5-6 -veined. Lower glume lateral veins with cross-veins. Lower glume apex attenuate. Upper glume elliptic; 8 mm long; 1.6 length of adjacent fertile lemma; membranous; pallid; without keels; 5-6 -veined. Upper glume lateral veins with cross-veins. Upper glume apex attenuate.
    Florets
    Fertile florets female. Fertile lemma elliptic, or ovate; dorsally compressed; 5 mm long; indurate; pallid; shiny; without keel; 5 -veined. Lemma lateral veins with cross-veins. Lemma surface pubescent; hairy at base. Lemma margins pubescent. Lemma apex acute. Palea indurate.
    Flowers
    Lodicules 3; 0.5 mm long; membranous. Anthers 3; 1.8-2 mm long. Stigmas 2.
    Spikelets
    Male spikelets distinct from female; 1 flowered; linear, or lanceolate; 3.7-4 mm long. Male spikelet glumes absent. Male spikelet lemma 5 -veined. Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or obovate; dorsally compressed; 8.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; truncate.
    Male
    Male spikelets distinct from female; 1 flowered; linear, or lanceolate; 3.7-4 mm long. Male spikelet glumes absent. Male spikelet lemma 5 -veined.
    Distribution
    South America: northern South America and Brazil.
    Reference
    Olyreae. Soderstrom.

    Images

    Distribution

    Native to:

    Brazil North, Colombia, French Guiana, Suriname

    Arberella flaccida (Döll) Soderstr. & C.E.Calderón appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nov 1, 2004 Spruce, R. [2649], Brazil K000433372 isotype
    Nov 1, 2004 Spruce, R. [2649], Brazil K000433373 isotype

    First published in Brittonia 31: 443 (1979)

    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.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    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.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    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