1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida oligantha Michx.

        This species is accepted, and its native range is S. Canada to U.S.A., Mexico (Coahuila).

    [GB]
    Habit
    Annual; caespitose. Culms 15-88 cm long; wiry. Culm-internodes distally glabrous. Lateral branches ample. Leaf-sheaths without keel; glabrous on surface. Leaf-sheath oral hairs lacking, or pubescent. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades filiform; 10-25 cm long; 1-2 mm wide. Leaf-blade surface glabrous, or hispid; sparsely hairy. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong; 5-14 cm long; bearing few spikelets. Spikelets solitary. Fertile spikelets sessile. Pedicels scabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; pubescent; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 18-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; pubescent; acute.
    Glume
    Glumes dissimilar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 18-25 mm long; 1 length of upper glume; membranous; 3-7 -veined. Lower glume apex acuminate; muticous, or awned; 1 -awned. Lower glume awn 0.5 mm long. Upper glume lanceolate; 18-25 mm long; 1.1 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid; acute; awned; 1 -awned. Upper glume awn 10-15 mm long.
    Florets
    Fertile lemma linear; subterete; 16-28 mm long; coriaceous; without keel; 3 -veined. Lemma surface scabrous; rough above. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn 3-branched; spreading; with 30-70 mm long limb; without a column. Lateral lemma awns spreading as much as principal; 30-70 mm long; subequal to principal.
    Flowers
    Anthers 3.
    Distribution
    North America: northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and southeast USA.
    Reference
    Aristideae. Gr Tex 1993.

    Images

    Distribution

    Native to:

    Alabama, Arizona, Arkansas, British Columbia, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Masachusettes, Mexico Northeast, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Ontario, Oregon, Pennsylvania, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin, Wyoming

    Aristida oligantha Michx. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nuttall, T. [s.n.], Arkansas K000906122

    First published in Fl. Bor.-Amer. 1: 41 (1803)

    Accepted by

    • Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Jones, R.L. (2005). Plant life of Kentucky. An illustrated guide to the vascular flora: 1-833. The universitry press of Kentucky.
    • 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
    • Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
    • Jones, R.L. (2005). Plant life of Kentucky. An illustrated guide to the vascular flora: 1-833. The universitry press of Kentucky.
    • 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 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