1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum philadelphicum Bernh. ex Nees

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

    [GB]
    Habit
    Annual; caespitose. Culms erect; slender; 20-50(-60) cm long. Culm-internodes distally hirsute, or hispid. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a fringe of hairs; 0.5-1.5 mm long. Leaf-blades 5-15 cm long; 2-7 mm wide; light green. Leaf-blade surface glabrous to hispid; hairy on both sides. Leaf-blade margins tuberculate-ciliate.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 7-15 cm long; 0.25-0.33 of culm length; with spikelets clustered towards branch tips. Primary panicle branches ascending, or spreading; 1 -nate. Panicle axis glabrous, or pubescent. Panicle branches stiff; bearded in axils. Spikelets appressed; in pairs. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 1.2-2(-2.2) mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 1.2-2(-2.2) mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.33 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; 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; 5 -veined; acute. Fertile lemma elliptic; dorsally compressed; 1.3-1.7 mm long; indurate; shiny; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
    Distribution
    North America: eastern Canada, north-central USA, northeast USA, south-central USA, and southeast USA.
    Reference
    Paniceae. Gr Texas 1994.

    Images

    Distribution

    Native to:

    Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Masachusettes, Michigan, Minnesota, Missouri, New Brunswick, New Hampshire, New Jersey, New York, North Carolina, Nova Scotia, Ohio, Oklahoma, Ontario, Pennsylvania, Québec, Rhode I., South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin

    Introduced into:

    Austria

    Panicum philadelphicum Bernh. ex Nees appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1977 Fernald, M. L. [113], Maine Panicum tuckermanii K000674456 syntype

    First published in C.F.P.von Martius, Fl. Bras. Enum. Pl. 2: 198 (1829)

    Accepted by

    • Ibrahim, K.M. & Peterson, P.M. (2014). Grasses of Washington, D.C. Smithsonian Contributions to Botany 99: 1-128.
    • 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 2019. 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 2019. 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