1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida portoricensis Pilg.

        This species is accepted, and its native range is Puerto Rico to Leeward Islands.

    [GB]
    Habit
    Perennial; caespitose. Culms erect, or geniculately ascending; 30-50 cm long. Lateral branches sparse. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs scanty. Ligule a fringe of hairs. Leaf-blades curved, or flexuous; involute; 5-10 cm long; 0.5-1 mm wide. Leaf-blade surface hirsute; sparsely hairy; hairy adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 3-8 cm long; contracted about primary branches. Primary panicle branches ascending, or spreading; 2-4 cm long; bearing spikelets almost to the base. Panicle branches stiff. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.75 mm long; pubescent; pungent.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.75 mm long; pubescent; pungent.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume linear; 7 mm long; 0.7 length of upper glume; membranous; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex setaceously attenuate. Upper glume linear; 10 mm long; membranous; 1 -veined. Upper glume primary vein smooth. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex setaceously attenuate.
    Florets
    Fertile lemma linear; subterete; 12 mm long; coriaceous; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn spreading; with 20-30 mm long limb; with a straight or slightly twisted column. Column of lemma awn 2-3 mm long. Lateral lemma awns spreading less than principal; 20-30 mm long; subequal to principal.
    Flowers
    Anthers 3.
    Distribution
    South America: Caribbean.
    Reference
    Aristideae. N Amer Fl 1994.

    Images

    Distribution

    Native to:

    Leeward Is., Puerto Rico

    Aristida portoricensis Pilg. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Sintenis, P. [77], Puerto Rico K000308631

    First published in I.Urban, Symb. Antill. 4: 100 (1903)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • 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.
    • 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

    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 2018. 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 2018. 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