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  1. Family: Poaceae Barnhart
    1. Genus: Urochloa P.Beauv.
      1. Urochloa lorentziana (Mez) Morrone & Zuloaga

        This species is accepted, and its native range is Peru to N. Argentina.

    [GB]
    Habit
    Annual. Culms geniculately ascending, or decumbent; 30-100 cm long. Ligule a fringe of hairs; 1 mm long. Leaf-blade base broadly rounded. Leaf-blades linear, or lanceolate; 10-30 cm long; 7-25 mm wide. Leaf-blade surface glabrous, or pubescent; hairy on both sides.
    Inflorescences
    Inflorescence composed of racemes. Racemes 4-20; borne along a central axis; unilateral; 1-8 cm long; simple, or with branchlets at base of longer racemes; secondary branches glomerate. Central inflorescence axis 6-30 cm long; pilose. Rhachis wingless; angular; pilose on surface. Spikelet packing lax; irregular. Spikelets in pairs. Fertile spikelets pedicelled. Pedicels oblong; 0.5-1 mm long; ciliate.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; acute; 3-3.3 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; acute; 3-3.3 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.5 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume lateral veins transversely connected at apex. Upper glume surface glabrous, or pubescent. 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; 5 -veined; glabrous, or pubescent; acute. Fertile lemma elliptic; 2.5-3 mm long; indurate; without keel. Lemma surface rugose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate; without keels. Palea surface rugose.
    Distribution
    South America: western South America and southern South America.
    Reference
    Paniceae. Fl Entre Rios.

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Bolivia, Paraguay, Peru

    Synonyms

    Other Data

    Urochloa lorentziana (Mez) Morrone & Zuloaga appears in other Kew resources:

    Bibliography

    First published in Darwiniana 31: 82 (1992)

    Not 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. [Cited as Brachiaria lorentziana.]

    Literature

    Kew Backbone Distributions

    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • Renvoize, S.A. (1998). Gramineas de Bolivia: 1-644. The Royal Botanic Gardens, Kew.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    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 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