1. Family: Poaceae Barnhart
    1. Genus: Triplasis P.Beauv.
      1. Triplasis americana P.Beauv.

        This species is accepted, and its native range is SE. U.S.A.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 30-60 cm long; disarticulating at the nodes. Ligule a fringe of hairs. Leaf-blades flat, or involute; 15-18 cm long; 2-4 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 2-5 cm long; bearing few spikelets. Primary panicle branches simple; bearing 1-2 fertile spikelets on each lower branch. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets linear; laterally compressed; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas; pubescent. Floret callus pubescent.
    Fertile
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets linear; laterally compressed; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas; pubescent. Floret callus pubescent.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume linear; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
    Florets
    Fertile lemma oblong; 5-6 mm long; membranous; keeled; 3 -veined. Lemma midvein pubescent. Lemma lateral veins close to margins. Lemma margins pubescent. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; 5-8 mm long overall; limb pubescent; glabrescent towards tip. Palea 0.75 length of lemma. Palea keels pubescent and with a crest of hairs. Rhachilla extension 0.5 length of fertile floret.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; laterally compressed; plano-convex; dark brown. Embryo projecting below grain.
    Cleistogene
    Cleistogenes present; in lower sheaths.
    Distribution
    North America: southeast USA.
    Reference
    Eragrostideae. WDC.

    Images

    Distribution

    Native to:

    Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina

    Triplasis americana P.Beauv. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Curtis, M.A. [s.n.], North Carolina K000899865
    s.coll. [s.n.], USA K000899866

    First published in Ess. Agrostogr.: 81 (1812)

    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