1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida pedroensis Henrard

        This species is accepted, and its native range is NW. Argentina.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; robust; 80-130 cm long; 2.5-3 mm diam.; 4-5 -noded. Culm-internodes similar in length; distally glabrous. Culm-nodes swollen. Lateral branches lacking. Leaf-sheaths longer than adjacent culm internode; scaberulous. Leaf-sheath oral hairs scanty, or lacking. Ligule a fringe of hairs. Leaf-blades involute; 40-60 cm long; 2-3 mm wide. Leaf-blade venation with 6 secondary veins. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins cartilaginous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle; embraced at base by subtending leaf. Panicle contracted; linear. Primary panicle branches appressed; distant. Panicle axis scaberulous; glabrous, or puberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3 mm long; scabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 12-14 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; obtuse.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 12-14 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; obtuse.
    Glume
    Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear; 10 mm long; 0.75 length of upper glume; membranous; 1 -veined. Lower glume primary vein ciliolate. Lower glume lateral veins absent. Lower glume surface pubescent; hairy in lines. Lower glume apex dentate; 2 -fid; awned; 1 -awned. Lower glume awn 3-4 mm long. Upper glume linear; 12-14 mm long; 3-4 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid; awned; 1 -awned. Upper glume awn 4-5 mm long.
    Florets
    Fertile lemma linear; subterete; 3-4 mm long; coriaceous; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn 3-branched; with 30 mm long limb; with twisted column. Column of lemma awn 10 mm long. Lateral lemma awns 30 mm long; subequal to principal. Palea hyaline; 0 -veined.
    Flowers
    Lodicules 2. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: southern South America.
    Reference
    Aristideae. Henrard 1997.

    Distribution

    Native to:

    Argentina Northwest

    Aristida pedroensis Henrard appears in other Kew resources:

    First published in Meded. Rijks-Herb. 58A: 232 (1932)

    Accepted by

    • 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.
    • 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
    • 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.

    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