1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum linearifolium Scribn.

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

    [GB]
    Habit
    Perennial; caespitose. Culms 25-50 cm long. Culm-internodes distally glabrous, or pubescent. Lateral branches sparse. Leaves basal and cauline; all alike, or heterophyllous with a basal winter rosette. Leaf-sheaths pilose. Ligule a fringe of hairs; 0.3-1 mm long. Leaf-blades linear, or lanceolate; flat, or involute; 8-20 cm long; 1-4 mm wide; 1-4 mm wide in winter rosette. Leaf-blade surface glabrous, or pilose, or hispid; hairy abaxially. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle. Panicle open; elliptic; 4-8 cm long; bearing few spikelets. Primary panicle branches simple, or sparsely divided. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; with obtuse base; dorsally compressed; obtuse; 2.2-3.2 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; with obtuse base; dorsally compressed; obtuse; 2.2-3.2 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.25-0.33 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume oblong; 1.1-1.2 length of adjacent fertile lemma; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1.1-1.15 length of fertile lemma; 1 length of spikelet; membranous; 7 -veined; pubescent; obtuse. Fertile lemma oblong; dorsally compressed; 2-2.8 mm long; indurate; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: western Canada, eastern Canada, north-central USA, northeast USA, south-central USA, and southeast USA.
    Reference
    Paniceae. Gr Texas 1994.
    [GB]
    Habit
    Perennial. Culms erect; 10-25 cm long. Lateral branches lacking. Leaves all alike. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs. Ligule an eciliate membrane, or a fringe of hairs. Leaf-blades 6-15 cm long; 2-5 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 4-8 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; obtuse; 2.7-3.2 mm long; falling entire. Rhachilla internodes elongated between glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; obtuse; 2.7-3.2 mm long; falling entire. Rhachilla internodes elongated between glumes.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.33 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 7 -veined; puberulous. Fertile lemma obovate; dorsally compressed; 2.2-3.2 mm long; indurate; without keel. Lemma margins involute. Palea involute; indurate.
    Distribution
    North America: western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, south-central USA, and southeast USA.
    Reference
    Paniceae. Man US Grass 2004.

    Distribution

    Native to:

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

    Panicum linearifolium Scribn. appears in other Kew resources:

    First published in Bull. Div. Agrostol. U.S.D.A. 11: 42 (1898)

    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

    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