1. Family: Poaceae Barnhart
    1. Genus: Chasmanthium Link
      1. Chasmanthium latifolium (Michx.) H.O.Yates

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; knotty. Culms 100-150 cm long. Ligule a ciliolate membrane. Leaf-blades lanceolate; 9-20 cm long; 10-20 mm wide. Leaf-blade venation with distinct cross veins.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 10-15(-35) cm long. Primary panicle branches drooping. Spikelets pendulous; solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1-2 basal sterile florets; 5-15(-24) fertile florets; with diminished florets at the apex. Spikelets elliptic, or ovate; laterally compressed; 20-40 mm long; 6-16 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Fertile
    Spikelets comprising 1-2 basal sterile florets; 5-15(-24) fertile florets; with diminished florets at the apex. Spikelets elliptic, or ovate; laterally compressed; 20-40 mm long; 6-16 mm wide; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5-7 mm long; 1 length of upper glume; herbaceous; 1-keeled; 5-7 -veined. Lower glume apex acute. Upper glume ovate; 5-7 mm long; 0.5-0.7 length of adjacent fertile lemma; herbaceous; 1-keeled; 5-7 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets similar; barren; without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to fertile lemma; elliptic; 6-8 mm long; herbaceous; 1-keeled; 7-11 -veined; acute. Fertile florets decreasing in size upwards. Fertile lemma ovate; 9-12 mm long; herbaceous; keeled; 11-15 -veined. Lemma midvein ciliolate. Lemma apex entire, or dentate; 2 -fid; acute. Palea bowed outwards; 2 -veined. Palea keels winged; conspicuously winged; ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 1; 4 mm long; yellow.
    Fruits
    Caryopsis with adherent pericarp; ovoid; laterally compressed; 2-2.5 mm long.
    Distribution
    North America: north-central USA, northeast USA, south-central USA, and southeast USA.
    Reference
    Centotheceae. WDC.

    Images

    Distribution

    Native to:

    Alabama, Arizona, Arkansas, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Manitoba, Maryland, Mexico Northeast, Michigan, Mississippi, Missouri, Nebraska, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia, Wisconsin

    Chasmanthium latifolium (Michx.) H.O.Yates appears in other Kew resources:

    First published in S. W. Naturalist 11: 416 (1966)

    Accepted by

    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    Literature

    Kew Backbone Distributions
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • 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 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

    Kew Science Photographs
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/