1. Family: Poaceae Barnhart
    1. Genus: Muhlenbergia Schreb.
      1. Muhlenbergia minutissima (Steud.) Swallen

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

    [GB]
    Habit
    Annual; caespitose; clumped densely. Culms geniculately ascending; weak; 5-40 cm long. Culm-internodes distally hirsute. Ligule an eciliate membrane; 1-3 mm long; hyaline; lacerate. Leaf-blades flat, or involute; 2-6 cm long; 1 mm wide. Leaf-blade surface scabrous; glabrous, or hirsute.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong; effuse; 10-20(-40) cm long; 0.66-0.75 of culm length. Spikelets spreading; solitary. Fertile spikelets pedicelled. Pedicels filiform; 2-5 mm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 1.2-1.8 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 1.2-1.8 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 elliptic; 0.5-1 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface pilose. Lower glume apex obtuse, or acute. Upper glume elliptic; 0.5-1 mm long; 0.4-0.6 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface pilose. Upper glume apex obtuse, or acute.
    Florets
    Fertile lemma lanceolate; 1.2-1.8 mm long; membranous; keeled; 3 -veined. Lemma midvein pubescent; hairy below. Lemma margins pubescent; hairy below. Lemma apex emarginate to obtuse; muticous, or mucronate. Palea 1 length of lemma; 2 -veined. Palea apex obtuse.
    Flowers
    Lodicules 2; cuneate; fleshy. Anthers 3; 0.3-0.5 mm long.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 0.6-1 mm long.
    Distribution
    North America: northwest USA, southwest USA, south-central USA, and Mexico. South America: Mesoamericana.
    Reference
    Eragrostideae. Gould.

    Images

    Distribution

    Native to:

    Arizona, California, Colorado, Guatemala, Idaho, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southwest, Montana, Nebraska, Nevada, New Mexico, Oregon, South Dakota, Texas, Utah, Washington, Wyoming

    Muhlenbergia minutissima (Steud.) Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1989 Hinton, G.B. [2455], México State K000465921
    Wolf, J. [1077], USA K000907281 isotype

    First published in Contr. U.S. Natl. Herb. 29: 207 (1947)

    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.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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