1. Family: Poaceae Barnhart
    1. Genus: Mesosetum Steud.
      1. Mesosetum exaratum (Trin.) Chase

        This species is accepted, and its native range is SE. & S. Brazil.

    [GB]
    Habit
    Perennial; caespitose. Butt sheaths pilose. Culms erect; slender; 8-35 cm long; 0.5-1 mm diam. Culm-nodes pubescent. Leaves mostly basal. Leaf-sheaths glabrous on surface. Ligule a fringe of hairs; 0.5-0.8 mm long. Leaf-blades filiform; convolute; 3-10 cm long; 0.5-1 mm wide. Leaf-blade apex attenuate; hardened.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; unilateral; 2-3.5 cm long; bearing few fertile spikelets; bearing 5-10 fertile spikelets on each. Rhachis subterete; glabrous on margins. Spikelet packing adaxial. Spikelets solitary. Fertile spikelets pedicelled. Pedicels free, or fused to internode; united wholly, or below; oblong; 1 mm long; ciliate; hairy at tip.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; laterally compressed; 3.8-4 mm long; falling entire. Spikelet callus pubescent.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; laterally compressed; 3.8-4 mm long; falling entire. Spikelet callus pubescent.
    Glume
    Glumes dissimilar; shorter than spikelet; firmer than fertile lemma. Lower glume oblong; 2.8-3.2 mm long; 0.7-0.8 length of spikelet; membranous; much thinner above (and along midline); 1-keeled; 3-5 -veined. Lower glume margins ciliate (above). Lower glume hairs white; 2 mm long. Lower glume apex obtuse, or acute. Upper glume lanceolate; 3.5-3.8 mm long; 0.9-1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface pilose; hairy above. Upper glume margins ciliate. Upper glume hairs white. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1 length of spikelet; membranous; 3-5 -veined; with marginal tufts of hair; 2 hair tufts in all; acute. Fertile lemma ovate; dorsally compressed; 3-3.3 mm long; membranous; much thinner on margins; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface glabrous. Lemma margins flat. Lemma apex acute. Palea membranous; without keels.
    Flowers
    Anthers 3; purple.
    Fruits
    Hilum linear; 1 length of caryopsis.
    Distribution
    South America: Brazil.
    Reference
    Paniceae. Filgueiras.

    Images

    Distribution

    Native to:

    Brazil South, Brazil Southeast

    Mesosetum exaratum (Trin.) Chase appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 3, 1988 Valls, J.F.M. [11260], Brazil K000982416
    Brazil K000643300
    Brazil K000643301
    Riedel [968], Brazil K000643302

    First published in Proc. Biol. Soc. Washington 24: 121 (1911)

    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.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.

    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