1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida cognata Trin. & Rupr.

        This species is accepted, and its native range is Bahamas, Lesser Antilles to Venezuela.

    [GB]
    Habit
    Perennial; caespitose. Culms geniculately ascending; 20-40 cm long. Lateral branches sparse; arising from lower culm. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking, or ciliate. Ligule a fringe of hairs. Leaf-blades involute; 5-15 cm long; 1 mm wide. Leaf-blade surface scabrous; rough adaxially; pilose; sparsely hairy; hairy adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 5-15 cm long. Primary panicle branches ascending; 1-2 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5 mm long; pubescent; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5 mm long; pubescent; acute.
    Glume
    Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume linear; 4-5 mm long; 0.7-0.8 length of upper glume; membranous; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume linear; 5-7 mm long; membranous; 1 -veined. Upper glume primary vein smooth. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma linear; subterete; 6-7 mm long; coriaceous; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex with a short cylindrical neck; with this appendage 1 mm long; awned; 3 -awned. Principal lemma awn 3-branched; with 10-15 mm long limb. Lateral lemma awns spreading less than principal; 10-15 mm long; subequal to principal.
    Flowers
    Anthers 3.
    Distribution
    South America: Caribbean and northern South America.
    Reference
    Aristideae. N Amer Fl 1994.

    Distribution

    Native to:

    Bahamas, Leeward Is., Netherlands Antilles, Venezuela, Venezuelan Antilles, Windward Is.

    Aristida cognata Trin. & Rupr. appears in other Kew resources:

    First published in Sp. Gram. Stipac.: 127 (1842)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • van Proosdij, A.S.J. (2012). Arnoldo's Zakflora, ed. 4: 1-318. Walburg Pers, Zutphen.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    Literature

    Kew Backbone Distributions
    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    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