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  1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus silveanus Swallen

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Butt sheaths papery; glossy. Culms erect; slender; 90-120 cm long. Culm-internodes antrorsely scabrous. Leaves mostly basal. Leaf-sheaths without keel; glabrous on surface, or pubescent. Ligule a fringe of hairs; 0.1-0.8 mm long. Leaf-blades curved, or flexuous; conduplicate, or involute; 15-30 cm long; 1-2 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 30-40 cm long; 10-12 cm wide; bearing few spikelets. Primary panicle branches ascending. Spikelets appressed, or ascending; solitary. Fertile spikelets pedicelled. Pedicels 5-8 mm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; reaching apex of florets. Lower glume lanceolate; 3-4.5 mm long; 0.75 length of upper glume; membranous; purple; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute, or acuminate. Upper glume ovate; 4-6 mm long; 1 length of adjacent fertile lemma; membranous; purple; without keels; 3 -veined. Upper glume lateral veins absent. Upper glume apex acute, or acuminate.
    Florets
    Fertile lemma ovate; 5-6 mm long; membranous; without keel; 1 -veined. Lemma apex acute. Palea 1 length of lemma; 2 -veined. Palea keels approximate.
    Flowers
    Anthers 3-4 mm long; purple.
    Fruits
    Caryopsis with free soft pericarp; oblong; 2-2.5 mm long. Embryo 0.33 length of caryopsis.
    Distribution
    North America: south-central USA and southeast .
    Reference
    Eragrostideae. Gr Tex 1993.

    Distribution

    Native to:

    Florida, Georgia, Louisiana, Oklahoma, Texas

    Other Data

    Sporobolus silveanus Swallen appears in other Kew resources:

    Bibliography

    First published in J. Washington Acad. Sci. 31: 350 (1941)

    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

    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