1. Family: Poaceae Barnhart
    1. Genus: Mesosetum Steud.
      1. Mesosetum annuum Swallen

        This species is accepted, and its native range is Brazil (Goiás, Maranhão, Piauí).

    [GB]
    Habit
    Annual. Culms geniculately ascending, or decumbent; slender; 30-85 cm long; without nodal roots, or rooting from lower nodes. Culm-nodes bearded. Leaves mostly basal. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades 1.2-9.2 cm long; 3-6 mm wide. Leaf-blade surface pilose. Leaf-blade margins glabrous, or ciliate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; unilateral; 2.5-12 cm long. Rhachis angular. Spikelet packing adaxial; regular; 2 -rowed. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3.5-4 mm long; falling entire. Spikelet callus pubescent.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3.5-4 mm long; falling entire. Spikelet callus pubescent.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; asymmetrical; 2.8-3 mm long; 0.75 length of spikelet; chartaceous; 1-keeled; 3 -veined. Lower glume surface pilose; hairy below. Lower glume hairs white. Lower glume apex emarginate, or obtuse. Upper glume lanceolate; 2.3-2.5 mm long; 0.6-1 length of spikelet; membranous; without keels; 3 -veined. 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 oblong; 1 length of spikelet; membranous; thicker on margins; 5 -veined; pilose; hairy on veins; ciliate on midvein; acute. Fertile lemma ovate; dorsally compressed; 2.5-3 mm long; coriaceous; without keel; 5 -veined. Lemma margins flat. Lemma apex acuminate. Palea coriaceous; without keels.
    Flowers
    Anthers 3; purple.
    Fruits
    Caryopsis ellipsoid; 2.2 mm long. Hilum linear; 1 length of caryopsis.
    Distribution
    South America: Brazil.
    Reference
    Paniceae. Filgueiras.

    Images

    Distribution

    Native to:

    Brazil Northeast, Brazil West-Central

    Mesosetum annuum Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nov 1, 2013 Swallen, J.R. [3512], Brazil K000982395
    Jan 1, 2013 Eiten, G. [4387], Brazil K000982394
    Jan 1, 2013 Swallen, J.R. [3529], Brazil K000982393
    May 1, 1998 Nascimento, M.S.B. [1305], Brazil K000982390
    May 1, 1998 Nascimento, M.S.B. [1364], Brazil K000982392
    Apr 8, 1984 Burchell [8679-20], Brazil K000982396
    Apr 8, 1984 Burchell [8659], Brazil K000982398
    Swallen, J.R. [4190], Piauí K000004407 isotype
    Swallen, J.R. [3828], Brazil K000982397

    First published in Brittonia 3: 377 (1937)

    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