1. Family: Poaceae Barnhart
    1. Genus: Louisiella C.E.Hubb. & J.Léonard
      1. Louisiella fluitans C.E.Hubb. & J.Léonard

        This species is accepted, and its native range is Cameroon to South Sudan.

    [GB]
    Habit
    Perennial. Culms prostrate; 10-30 cm long; 5-7 mm diam.; spongy; rooting from lower nodes. Culm-nodes bearded. Leaf-sheaths reticulately veined. Ligule a ciliolate membrane. Leaf-blades 10-20 cm long; 7-10 mm wide.
    Inflorescences
    Inflorescence composed of racemes; embraced at base by subtending leaf. Racemes 5-20; borne along a central axis; unilateral; 3-5 cm long. Central inflorescence axis 2-5 cm long. Rhachis angular. Spikelets appressed; in pairs, or in threes. Fertile spikelets pedicelled; 2-3 in the cluster. Pedicels filiform; angular; 1-1.5 mm long; scaberulous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acuminate; 7-8.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acuminate; 7-8.5 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume oblate; 1 mm long; 0.1-0.2 length of spikelet; hyaline; without keels; 0-2 -veined. Lower glume lateral veins absent to obscure. Lower glume apex obtuse. Upper glume lanceolate; membranous; without keels; 7-9 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; lanceolate; 1 length of spikelet; membranous; 7-9 -veined; scabrous; rough on veins; acuminate. Fertile lemma ovate; 4-5 mm long; coriaceous; much thinner on margins; without keel; 7 -veined. Lemma margins involute. Lemma apex acute; pubescent. Palea coriaceous.
    Fruits
    Caryopsis with adherent pericarp; oblong; dorsally compressed; plano-convex. Embryo 0.3 length of caryopsis. Hilum linear; 1 length of caryopsis.
    Distribution
    Africa: west-central tropical.
    Reference
    Paniceae. WDC.

    Images

    Distribution

    Native to:

    Cameroon, Central African Repu, Sudan, Zaïre

    Louisiella fluitans C.E.Hubb. & J.Léonard appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Léonard, J. [1558], Zaïre K000282277
    Léonard [1798], Zaire K000282273 isotype
    Léonard [1798], Zaire K000282272 isotype
    Léonard [1798], Zaire K000282274 isotype

    First published in Bull. Jard. Bot. État Bruxelles 22: 317 (1952)

    Accepted by

    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
    • Scataglini, M.A., Lizarazu, M.A. & Zuloaga, F.O. (2014). A peculiar amphitropical genus of Paniceae (Poaceae, Panicoideae) Systematic Botany 39: 1108-1119.
    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
    • 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
    • Scataglini, M.A., Lizarazu, M.A. & Zuloaga, F.O. (2014). A peculiar amphitropical genus of Paniceae (Poaceae, Panicoideae) Systematic Botany 39: 1108-1119.
    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.

    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 2020. 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 2020. 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