1. Family: Poaceae Barnhart
    1. Genus: Sporobolus R.Br.
      1. Sporobolus hookerianus P.M.Peterson & Saarela

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

    [GB]
    Habit
    Perennial; culms solitary. Rhizomes elongated; scaly. Culms erect; 50-100 cm long. Leaf-sheath oral hairs lacking. Ligule a fringe of hairs; 0.5-1 mm long. Leaf-blades flat, or involute; 2-5 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Racemes 4-12; borne along a central axis; appressed; unilateral; 1.5-8 cm long; bearing 10-30 fertile spikelets on each. Central inflorescence axis 8-25 cm long. Rhachis angular; scabrous on margins; glabrous on margins; terminating in a spikelet. Spikelet packing broadside to rhachis; regular; 2 -rowed. Spikelets pectinate; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; laterally compressed; 6-11 mm long; falling entire.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; laterally compressed; 6-11 mm long; falling entire.
    Glume
    Glumes dissimilar; reaching apex of florets. Lower glume linear; 3-7 mm long; 0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein eciliate, or ciliate. Lower glume lateral veins absent. Lower glume surface glabrous, or pilose. Lower glume margins ciliolate. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate; 6-10 mm long; 1 length of adjacent fertile lemma; herbaceous; 1-keeled; 3 -veined. Upper glume primary vein eciliate, or ciliate. Upper glume lateral veins prominent (on one side). Upper glume surface glabrous, or pilose. Upper glume margins eciliate, or ciliolate. Upper glume apex acute; muticous, or mucronate.
    Florets
    Fertile lemma oblong; 6-10 mm long; herbaceous; keeled; 3 -veined. Lemma midvein ciliate; hairy above. Lemma surface glabrous, or pilose. Lemma margins ciliolate. Lemma apex obtuse. Palea 2 -veined.
    Flowers
    Lodicules absent. Anthers 3; 2.5-5 mm long.
    Distribution
    North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, southwest USA, and south-central USA.
    Reference
    Cynodonteae. Mobberley 1993.

    Distribution

    Native to:

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

    Sporobolus hookerianus P.M.Peterson & Saarela appears in other Kew resources:

    First published in Taxon 63: 1237 (2014)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    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

    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