1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida achalensis Mez

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

    [GB]
    Habit
    Annual. Culms 55-70 cm long. Lateral branches lacking. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs; 0.1 mm long. Collar glabrous. Leaf-blades curled (lower), or straight (upper); flat (lower), or conduplicate (upper); 20-25 cm long; 1.5-2.5 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade apex acute; smooth.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; 12-16 cm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; straight; (0.5-)0.6 mm long; pilose; acute (subacute).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets subterete; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; straight; (0.5-)0.6 mm long; pilose; acute (subacute).
    Glume
    Glumes persistent; dissimilar (lower longer than upper, rarely subequal). Lower glume lanceolate; 11-14 mm long; 1 -veined. Lower glume surface asperulous; rough generally. Lower glume apex acuminate (shortly awned); muticous. Upper glume lanceolate; 10.2-12.5 mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; acuminate (shortly awned).
    Florets
    Fertile lemma subterete; 4-5 mm long; without keel; rounded throughout; 3 -veined. Lemma surface scabrous; rough above; with a median groove (ventral,longitudinal). Lemma margins involute. Lemma apex awned; 3 -awned. Principal lemma awn straight; ascending; simple at base; with 16-20 mm long limb; with twisted column. Column of lemma awn 2-3.2 mm long. Lateral lemma awns ascending; 14-16.5 mm long; shorter than principal.
    Distribution
    South America: southern South America.
    Reference
    Aristideae. LO-W 1993.

    Distribution

    Doubtfully present in:

    Brazil Northeast

    Native to:

    Argentina Northeast, Argentina Northwest

    Aristida achalensis Mez appears in other Kew resources:

    First published in Repert. Spec. Nov. Regni Veg. 17: 149 (1921)

    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
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • 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