1. Family: Poaceae Barnhart
    1. Genus: Sorghastrum Nash
      1. Sorghastrum secundum (Elliott) Nash

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

    [GB]
    Habit
    Perennial. Culms erect; 90-150 cm long; 1.5-3 mm diam. Culm-internodes distally glabrous, or pubescent. Lateral branches lacking. Leaf-sheaths 20-45 cm long; glabrous on surface. Ligule an eciliate membrane; 2.5-4 mm long. Leaf-blades flat, or involute; 20-50 cm long; 3-6 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle with branches tipped by a raceme. Peduncle 25-50 cm long. Panicle open; lanceolate; secund; 15-40 cm long. Primary panicle branches appressed. Panicle axis glabrous. Racemes bearing a triad of spikelets, or few fertile spikelets; 1-3 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes filiform. Spikelets in pairs, or in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster, or 2 in the cluster. Pedicels filiform; 4-6 mm long; pubescent.
    Spikelets
    Companion sterile spikelets represented by barren pedicels. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; base obtuse.
    Sterile
    Companion sterile spikelets represented by barren pedicels.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus pilose; base obtuse.
    Glume
    Glumes dissimilar; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; dark brown; without keels; 7-9 -veined. Lower glume surface pubescent. Lower glume apex truncate. Upper glume oblong; 1 length of spikelet; coriaceous; dark brown; without keels; 5 -veined. Upper glume surface glabrous. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 4-5.5 mm long; hyaline; 2 -veined; ciliate on margins; dentate; 2 -fid. Fertile lemma oblong; 4-5.5 mm long; hyaline; without keel; 3 -veined. Lemma margins ciliolate. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 30-40 mm long overall; with twisted column. Column of lemma awn hispidulous. Palea absent or minute.
    Flowers
    Lodicules 2; glabrous. Anthers 3; 2.5-4.5 mm long.
    Fruits
    Caryopsis 2-3 mm long.
    Distribution
    North America: south-central USA and southeast .
    Reference
    Andropogoneae. Davila 1993.

    Images

    Distribution

    Native to:

    Alabama, Arkansas, Bahamas, Florida, Georgia, Kansas, Louisiana, Mississippi, South Carolina

    Sorghastrum secundum (Elliott) Nash appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Mar 1, 1988 Elliot [s.n.] K001050444

    First published in J.K.Small, Fl. S.E. U.S.: 67 (1903)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • 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.
    • 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 2018. 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 2018. 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