1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum davidsei Zuloaga & Morrone

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

    [GB]
    Habit
    Perennial. Culms decumbent; 150-320 cm long; rooting from lower nodes. Culm-internodes 8-23 cm long; distally hispid. Culm-nodes constricted; bearded. Lateral branches ample; arising from lower culm. Leaf-sheaths 5-8 cm long; hirsute; with tubercle-based hairs; outer margin hairy. Ligule a ciliate membrane; 0.2 mm long. Collar pilose. Leaf-blade base broadly rounded. Leaf-blades lanceolate; 9-13 cm long; 10-13 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface pilose; sparsely hairy; hairy abaxially. Leaf-blade margins glabrous, or ciliate; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Peduncle 10-40 cm long. Panicle open; ovate; 12-20 cm long; 7-12 cm wide. Primary panicle branches whorled at lower nodes. Panicle branches flexuous; eglandular; glabrous; pubescent in axils. Spikelets solitary. Fertile spikelets pedicelled. Pedicels flexuous; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic; dorsally compressed; 3-3.3 mm long; 1 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic; dorsally compressed; 3-3.3 mm long; 1 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1.3-1.8 mm long; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume elliptic; 2.1-2.7 mm long; 0.66-0.75 length of spikelet; membranous; without keels; 11-14 -veined. Upper glume surface asperulous. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 10-12 -veined; acute. Palea of lower sterile floret 2.1-2.4 mm long; 0.66 length of lemma. Fertile lemma elliptic; dorsally compressed; 2.4-2.7 mm long; 1 mm wide; indurate; without keel; winged on margins (at apex). Lemma surface papillose. Lemma margins involute. Lemma apex acute; with a little green crest and scabrous. Palea involute; indurate.
    Flowers
    Anthers 3; 1.2 mm long.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; 1.8 mm long. Embryo 0.33 length of caryopsis. Hilum punctiform.
    Distribution
    South America: northern South America.
    Reference
    Paniceae. Zuloaga 1994.

    Distribution

    Native to:

    Brazil North, Venezuela

    Panicum davidsei Zuloaga & Morrone appears in other Kew resources:

    First published in Ann. Missouri Bot. Gard. 78: 158 (1991)

    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/.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/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