1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida amazonensis Longhi-Wagner

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

    [GB]
    Habit
    Perennial. Culms 35-47 cm long. Lateral branches lacking. Leaf-sheath oral hairs bearded. Ligule a fringe of hairs; 0.1 mm long. Collar glabrous. Leaf-blades straight; conduplicate; 10-14 cm long; 1.8-2 mm wide. Leaf-blade surface scabrous; rough adaxially; pilose; sparsely hairy; hairy adaxially. Leaf-blade apex obtuse; smooth.
    Inflorescences
    Inflorescence a panicle. Panicle contracted (or subcontracted); 15-29 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; 0.8 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; 0.8 mm long; pilose; acute (subacute).
    Glume
    Glumes persistent; dissimilar (lower longer than upper sometimes subequal). Lower glume lanceolate; 6.5-8 mm long; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute (shortly awned); muticous, or mucronate. Upper glume lanceolate; 6.2-7(-7.8) mm long; 1 -veined. Upper glume surface smooth. Upper glume apex entire; acute (shortly awned).
    Florets
    Fertile lemma subterete; 8-9 mm long; without keel; rounded throughout; 3 -veined. Lemma surface scaberulous; rough above; without grooves. Lemma margins convolute. Lemma apex awned; 3 -awned. Principal lemma awn straight (or slightly bent); ascending, or spreading; simple at base; with 16.5-20 mm long limb; without a column. Lateral lemma awns ascending; 14.2-18 mm long; shorter than principal (slightly).
    Distribution
    South America: Brazil.
    Reference
    Aristideae. LO-W 1993.
    Diagnostic
    Blades constricted near the apex.

    Images

    Distribution

    Native to:

    Brazil North

    Aristida amazonensis Longhi-Wagner appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Calderon, C.E. [2739], Brazil K000308672 holotype

    First published in Kew Bull. 49: 817 (1994)

    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.

    Literature

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

    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 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