1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus arcuatus (K.E.Rogers) P.M.Peterson

        This species is accepted, and its native range is Oklahoma to Alabama.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms 75-150 cm long; 2-5 mm diam. Culm-internodes smooth, or scaberulous. Culm-nodes bearded. Lateral branches lacking. Leaf-sheaths 6-15 cm long; mostly shorter than adjacent culm internode; glabrous on surface, or pilose; with tubercle-based hairs; outer margin hairy. Ligule a ciliate membrane; 0.2-0.7 mm long. Collar ciliate. Leaf-blades 30-85 cm long; 1.5-6.5 mm wide. Leaf-blade surface pilose; hairy adaxially. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex filiform.
    Inflorescences
    Inflorescence a panicle. Peduncle 15-38 cm long. Panicle open; ovate; 15-45 cm long; 8-40 cm wide. Primary panicle branches ascending, or spreading; 1-2 -nate. Panicle branches scabrous; pubescent in axils. Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels 1-8 mm long; smooth, or scaberulous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7.4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 2-2.5 mm long; 0.3-0.4 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7.4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 2-2.5 mm long; 0.3-0.4 length of lemma.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 2.7-4.1 mm long; 0.66-0.75 length of upper glume; membranous; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 4.2-5.4 mm long; 0.75 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acuminate, or attenuate.
    Florets
    Fertile lemma lanceolate; 5.5-7.1 mm long; membranous; 1 -veined. Lemma midvein pubescent. Lemma surface glabrous. Lemma apex attenuate. Palea 5.4-6.2 mm long; 2 -veined. Palea surface pubescent; hairy on back. Palea apex dentate; 2 -fid.
    Flowers
    Anthers 3; 3 mm long.
    Fruits
    Caryopsis with free soft pericarp.
    Distribution
    North America: north-central USA and southeast .
    Reference
    Eragrostideae. Rogers 2002.

    Distribution

    Native to:

    Alabama, Arkansas, Oklahoma, Tennessee

    Sporobolus arcuatus (K.E.Rogers) P.M.Peterson appears in other Kew resources:

    First published in Taxon 63: 1233 (2014)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    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