1. Family: Poaceae Barnhart
    1. Genus: Danthonia DC.
      1. Danthonia unispicata (Thurb.) Munro ex Macoun

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Culms 15-25 cm long; disarticulating at the nodes. Leaf-sheaths pilose. Ligule a fringe of hairs. Leaf-blades flat, or involute; 4-15 cm long; 1-3 mm wide. Leaf-blade surface pilose.
    Inflorescences
    Inflorescence comprising only a few spikelets; comprising 1(-3) fertile spikelets. Spikelets appressed, or ascending; solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-18 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent.
    Fertile
    Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-18 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 13-18 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 13-18 mm long; 2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex acuminate.
    Florets
    Fertile lemma elliptic; 7-9 mm long; chartaceous; without keel; 7 -veined. Lemma margins eciliate, or ciliate; hairy below. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 8-9 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 1-2 mm long; shorter than principal. Palea 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; cuneate; fleshy; glabrous. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Cleistogene
    Cleistogenes present; in lower sheaths.
    Distribution
    North America: western Canada, northwest USA, and southwest USA.
    Reference
    Arundineae. Man US Gr 1993.

    Images

    Distribution

    Native to:

    Alberta, British Columbia, California, Colorado, Idaho, Montana, Nevada, Oregon, Saskatchewan, South Dakota, Utah, Washington, Wyoming

    Danthonia unispicata (Thurb.) Munro ex Macoun appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Oct 1, 1961 Purpus, C.A. [5247], USA K000702406
    Oct 1, 1961 Geyer, C.A. [189], USA K000702415
    Oct 1, 1961 Piper, C.V. [s.n.], USA K000702405
    Oct 1, 1961 Lyall [s.n.], USA K000702402
    Oct 1, 1961 Leiberg, J.B. [2269], USA K000702400
    Oct 1, 1961 Elmer, A.D.E. [1327], USA K000702410
    Oct 1, 1961 Elmer, A.D.E. [1327], USA K000702411
    May 1, 1961 Peck, M.E. [10128], USA K000702401
    Oct 1, 1960 Nuttall [s.n.], USA K000702407
    Oct 1, 1960 Nuttall [s.n.], USA K000702408
    May 1, 1960 Swallen, J.R. [6439], USA K000702417
    May 1, 1960 Macbride, J.F. [3453], USA K000702418
    May 1, 1960 Nelson, A. [7468], USA K000702416
    May 1, 1960 Hoover, R.F. [4493], USA K000702409
    May 1, 1960 Skusdorf, W. [8699], USA K000702412
    Geyer, C.A. [189], USA K000702413 Unknown type material
    Geyer, C.A. [189], USA K000702414 Unknown type material
    Alexander, A.M. [5393], USA K000702404
    Leiberg, J.B. [338], USA K000702403
    Aiken, S.G [1465], Canada K000702399

    First published in Cat. Canad. Pl. 2(4): 215 (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.
    • 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
    • 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 2020. 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 2020. 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