1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum piauiense Swallen

        This species is accepted, and its native range is NE. Brazil.

    [GB]
    Habit
    Perennial; caespitose. Roots bearing tubers. Cataphylls evident. Rhizomes short. Butt sheaths woolly. Glands sunken crateriform. Culms erect; 40-80 cm long. Culm-internodes terete; distally glabrous, or pilose. Culm-nodes constricted; brown; pubescent. Lateral branches ample. Leaf-sheaths 4-6 cm long; longer than adjacent culm internode; glabrous on surface, or pilose; outer margin hairy. Ligule a ciliate membrane; 0.5 mm long; glabrous on abaxial surface, or ciliate from base of abaxial surface. Collar pubescent. Leaf-blade base cordate; with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades lanceolate; 9-13 cm long; 10-15 mm wide. Leaf-blade surface scabrous; rough on both sides; glabrous, or hirsute; densely hairy; hairy on both sides. Leaf-blade margins cartilaginous; scaberulous; glabrous, or ciliate; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 20-30; borne along a central axis; ascending; unilateral; 1-3 cm long; simple, or secondarily branched. Central inflorescence axis 7-22 cm long; hispid. Rhachis angular; with scattered hairs; scabrous on margins. Raceme-bases hirsute. Spikelets in pairs. Fertile spikelets sessile and pedicelled. Pedicels scabrous; glabrous, or ciliate.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.4-2.8 mm long; 0.8 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.4-2.8 mm long; 0.8 mm wide; falling entire.
    Glume
    Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1.8-2.5 mm long; 0.5-0.75 length of spikelet; membranous; without keels; 3 -veined. Lower glume primary vein scabrous. Lower glume inner surface pubescent. Lower glume apex acuminate. Upper glume ovate; 2.3-2.7 mm long; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume primary vein scabrous. Upper glume surface scabrous; glabrous, or pilose; inner surface pubescent. Upper glume margins ciliate. Upper glume apex acute, or acuminate.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 2.3-2.6 mm long; 1 length of spikelet; membranous; eglandular, or glandular (2-4 glands); 5 -veined; scabrous; glabrous, or pilose; ciliate on margins; acute. Palea of lower sterile floret 1.7-2 mm long. Fertile lemma lanceolate; dorsally compressed; 1.7-2 mm long; indurate; yellow; without keel. Lemma margins involute. Palea involute; indurate.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; 1.3 mm long. Hilum elliptic.
    Distribution
    South America: Brazil.
    Reference
    Paniceae. Zuloaga 1996.

    Images

    Distribution

    Native to:

    Brazil Northeast

    Panicum piauiense Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Gardner, G. [3512], Goiás K000979162 isotype
    Gardner, G. [3512], Goiás K000979163 isotype

    First published in Sellowia 18: 110 (1966)

    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