1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum xanthophysum A.Gray

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

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Culms erect, or geniculately ascending; 20-55 cm long. Culm-internodes antrorsely scabrous. Culm-nodes glabrous. Lateral branches ample; arising from mid culm. Leaves heterophyllous with a basal winter rosette. Leaf-sheaths loose; pilose; with tubercle-based hairs; outer margin hairy. Ligule a ciliate membrane; 1 mm long. Leaf-blades erect; lanceolate; 10-15 cm long; 10-20 mm wide. Leaf-blade venation prominent. Leaf-blade surface glabrous. Leaf-blade margins tuberculate-ciliate; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle; terminal and axillary. Panicle open; linear; 5-15 cm long; bearing few spikelets. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; compressed slightly; obtuse; 3.7-4 mm long; 2-2.1 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; compressed slightly; obtuse; 3.7-4 mm long; 2-2.1 mm wide; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 0.5 length of spikelet; membranous; without keels. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume lateral veins prominent. Upper glume surface pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; with palea, or without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; prominently veined; pubescent; obtuse. Fertile lemma obovate; dorsally compressed; 2.9-3 mm long; 2 mm wide; indurate; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Distribution
    North America: western Canada, eastern Canada, north-central USA, and northeast USA.
    Reference
    Paniceae. Chase 1994.

    Images

    Distribution

    Native to:

    Connecticut, Iowa, Maine, Manitoba, Masachusettes, Michigan, Minnesota, New Brunswick, New Hampshire, New Jersey, New York, Nova Scotia, Ontario, Pennsylvania, Québec, Saskatchewan, South Dakota, Vermont, West Virginia, Wisconsin

    Panicum xanthophysum A.Gray appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Gay, J. [28], New York K000674491
    Gray, A. [s.n.], New York K000674487
    Gray, A. [s.n.], Manitoba K000674489
    Bentham, G. [28], New York K000674490
    Vasey, G. [s.n.], New York K000674488

    First published in Manual: 613 (1848)

    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.

    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