1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida tuberculosa Nutt.

        This species is accepted, and its native range is N. Central & E. U.S.A.

    [GB]
    Habit
    Annual. Butt sheaths villous. Culms erect; 24-50 cm long. Lateral branches ample; arising from lower culm. Leaf-sheaths glabrous on surface; outer margin glabrous, or hairy. Ligule a fringe of hairs. Leaf-blades involute; 10-20 cm long; 1-3 mm wide. Leaf-blade surface ribbed; scabrous; rough adaxially. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; 10-20 cm long. Primary panicle branches ascending; 2 -nate. Panicle branches with prominent pulvini. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 6-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 3-4 mm long; pubescent; pungent.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 6-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 3-4 mm long; pubescent; pungent.
    Glume
    Glumes similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume linear; 6-12 mm long; 1 length of upper glume; membranous. Lower glume apex acute; awned; 1 -awned. Lower glume awn 3-6 mm long. Upper glume linear; 6-12 mm long; membranous. Upper glume apex acute; awned; 1 -awned. Upper glume awn 3-6 mm long.
    Florets
    Fertile lemma linear; subterete; 11-13 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, or recurved at base of limb; with 20-40 mm long limb; with twisted column; deciduous; abscissing from top of lemma. Column of lemma awn 10-15 mm long. Lateral lemma awns spreading as much as principal; 30-40 mm long; subequal to principal.
    Flowers
    Anthers 3.
    Distribution
    North America: north-central USA, northeast USA, and southeast USA.
    Reference
    Aristideae. Gr Indiana 1994.

    Images

    Distribution

    Native to:

    Alabama, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maryland, Masachusettes, Michigan, Minnesota, Mississippi, New Hampshire, New Jersey, New York, North Carolina, South Carolina, Virginia, Wisconsin

    Aristida tuberculosa Nutt. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Holzinger, J.M. [s.n.], Minnesota K000906132
    Nuttall, T. [s.n.], Georgia (USA) K000906131
    Nuttall, T. [s.n.], Georgia (USA) K000906135
    Elliott, S. [s.n.] K000906133
    s.coll. [s.n.], New Jersey K000906134

    First published in Gen. N. Amer. Pl. 1: 57 (1818)

    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.
    • 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
    • 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