1. Family: Poaceae Barnhart
    1. Genus: Muhlenbergia Schreb.
      1. Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb.

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

    [GB]
    Habit
    Perennial. Rhizomes elongated; scaly. Culms 25-60(-100) cm long. Culm-internodes smooth; distally glabrous. Lateral branches lacking, or sparse. Leaf-sheaths keeled; smooth, or scaberulous, or antrorsely scabrous. Ligule an eciliate membrane; 0.6-1.5 mm long; erose, or lacerate; truncate. Leaf-blades flat, or involute; 4-10(-16) cm long; 3-5(-7) mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear, or lanceolate; interrupted; 3-10(-17) cm long; 0.4-1(-1.8) cm wide. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.2-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.2-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet; similar to fertile lemma in texture. Lower glume lanceolate; 1.5-3 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex attenuate; awned; 1 -awned. Lower glume awn 3-4.5 mm long. Upper glume lanceolate; 1.5-3 mm long; 0.66 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex attenuate; awned; 1 -awned. Upper glume awn 3-4.5 mm long.
    Florets
    Fertile lemma lanceolate; 2.2-4.5 mm long; membranous; keeled; 3 -veined. Lemma midvein eciliate. Lemma surface pubescent; hairy at base. Lemma margins eciliate. Lemma hairs 0.5-0.9 mm long. Lemma apex attenuate; muticous. Palea 0.9 length of lemma; 2 -veined. Palea surface pilose; hairy on back; hairy below.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 0.4-0.7 mm long; yellow.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 1.4-2.3 mm long.
    Distribution
    North America: western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and Mexico.
    Reference
    Eragrostideae. Gould.

    Images

    Distribution

    Native to:

    Alberta, Arizona, British Columbia, Colorado, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Manitoba, Mexico Northeast, Minnesota, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Mexico, North Dakota, Nova Scotia, Oklahoma, Ontario, Oregon, Québec, Saskatchewan, South Dakota, Texas, Utah, Vermont, Virginia, Washington, Wisconsin, Wyoming

    Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1984 Ball, C.R. [113], USA K000907311
    Jan 1, 1984 Schribner, F.L. [s.n.], USA K000907310

    First published in Prelim. Cat.: 67 (1888)

    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.
    • 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.

    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

    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