1. Family: Poaceae Barnhart
    1. Genus: Amphicarpum Kunth
      1. Amphicarpum muhlenbergianum (Schult.) Hitchc.

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

    [GB]
    Habit
    Perennial. Cataphylls evident. Rhizomes elongated. Culms erect, or geniculately ascending; 10-70 cm long; rooting from lower nodes. Lateral branches sparse. Leaves cauline. Leaf-sheaths ribbed; hispid. Ligule a fringe of hairs. Leaf-blade base simple, or broadly rounded. Leaf-blades lanceolate; (0.5-)3-10 cm long; 5-10 mm wide; herbaceous to coriaceous. Leaf-blade surface smooth, or scaberulous; glabrous. Leaf-blade margins cartilaginous.
    Inflorescences
    Inflorescence a panicle, or composed of racemes. Panicle open; lanceolate; 10-25 cm long; contracted about primary branches. Primary panicle branches distant; 1 -nate; indistinct the panicle almost racemose, or simple; 1.5-15 cm long. Panicle branches scaberulous. Racemes 1-4; single, or borne along a central axis; 1.5-15 cm long. Central inflorescence axis 5-10 cm long. Spikelets ascending, or appressed; solitary. Fertile spikelets pedicelled. Pedicels filiform; 1-8 mm long; scabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acuminate; 6-7 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acuminate; 6-7 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets, or shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 1 mm long; 0.1-0.2 length of spikelet; membranous, or scarious; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 0.9-1 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; without keels; 5 -veined; acute. Fertile lemma elliptic; 5.5-6 mm long; coriaceous, or indurate; without keel; 5 -veined. Lemma lateral veins transversely connected at apex. Lemma margins involute. Lemma apex apiculate. Palea elliptic; 1 length of lemma; indurate; 2 -veined. Palea surface papillose. Palea apex acuminate.
    Flowers
    Lodicules 2; cuneate; 0.5 mm long; fleshy. Anthers 3; 4 mm long. Stigmas 2. Ovary glabrous.
    Cleistogene
    Cleistogenes present; underground.
    Distribution
    North America: southeast USA.
    Reference
    Paniceae. TB.

    Images

    Distribution

    Native to:

    Alabama, Florida, Georgia, North Carolina, South Carolina

    Amphicarpum muhlenbergianum (Schult.) Hitchc. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nash, G. V. [1182], Florida K000674807
    Chapman, A. V. [s.n.], Florida K000674806

    First published in Bartonia 14: 34 (1932)

    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 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