1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida purpurascens Poir.

        This species is accepted, and its native range is S. Ontario to Central & E. U.S.A., SE. Mexico to Central America, Cuba.

    [GB]
    Habit
    Perennial; caespitose. Rootstock evident. Rhizomes short. Culms slender; 30-80 cm long; 1-2 mm diam. Lateral branches sparse. Leaf-sheaths without keel; glabrous on surface, or pubescent. Ligule a fringe of hairs; 0.2-0.3 mm long. Leaf-blades flat, or involute; 15-30 cm long; 1-2.5 mm wide. Leaf-blade surface glabrous; hairless except near base.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 10-35 cm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 7-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 7-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; acute.
    Glume
    Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7-10 mm long; 1.1-1.4 length of upper glume; membranous; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume lanceolate; 6-7 mm long; 1-1.1 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous. Upper glume apex acuminate.
    Florets
    Fertile lemma linear; subterete; 5-7 mm long; coriaceous; purple; without keel; 3 -veined. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn spreading; 15-28 mm long overall; with 15-28 mm long limb; without a column. Lateral lemma awns spreading less than principal; 13-18 mm long; shorter than principal.
    Flowers
    Anthers 3.
    Distribution
    North America: eastern Canada, north-central USA, northeast USA, south-central USA, southeast USA, and Mexico. South America: Mesoamericana and Caribbean.
    Reference
    Aristideae. Gr Tex 1993.

    Images

    Distribution

    Native to:

    Alabama, Arkansas, Belize, Connecticut, Cuba, Delaware, District of Columbia, Florida, Georgia, Honduras, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Masachusettes, Mexico Southeast, Michigan, Mississippi, Missouri, Nebraska, New Jersey, New York, Nicaragua, North Carolina, Ohio, Oklahoma, Ontario, Pennsylvania, Rhode I., South Carolina, Tennessee, Texas, Virginia, West Virginia, Wisconsin

    Aristida purpurascens Poir. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Elliott, S. [s.n.], USA K000906099

    First published in J.B.A.M.de Lamarck, Encycl., Suppl. 1: 452 (1810)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • 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.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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