1. Family: Poaceae Barnhart
    1. Genus: Muhlenbergia Schreb.
      1. Muhlenbergia filiformis (Thurb.) Rydb.

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

    [GB]
    Habit
    Annual; caespitose; clumped loosely. Culms erect, or geniculately ascending; slender; 5-20 cm long; without nodal roots, or rooting from lower nodes. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 1-2 mm long; erose; obtuse. Leaf-blades 1-5 cm long; 1-2 mm wide. Leaf-blade surface scabrous; rough adaxially, or on both sides.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; interrupted; 2-6 cm long; bearing few spikelets. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume oblong; 0.6-1 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex entire, or erose; obtuse. Upper glume oblong; 0.6-1 mm long; 0.33-0.5 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex entire, or erose; obtuse.
    Florets
    Fertile lemma lanceolate; 2 mm long; membranous; without keel; 3 -veined. Lemma surface scaberulous; rough above. Lemma apex acute; muticous, or mucronate. Palea 1 length of lemma; 2 -veined. Palea surface scaberulous (above).
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 0.6-0.9 mm long; purple.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 1-1.2 mm long; dark brown.
    Distribution
    North America: western Canada, northwest USA, north-central USA, southwest USA, south-central USA, and Mexico.
    Reference
    Eragrostideae. Gr Baja Cal 1994.

    Images

    Distribution

    Native to:

    Arizona, British Columbia, California, Colorado, Idaho, Kansas, Mexico Northwest, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, South Dakota, Utah, Washington, Wyoming

    Muhlenbergia filiformis (Thurb.) Rydb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Brewer, W.H. [2827], USA K000907286 isolectotype

    First published in Bull. Torrey Bot. Club 32: 600 (1905)

    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