1. Family: Poaceae Barnhart
    1. Genus: × Dupoa J.Cay. & Darbysh.
      1. × Dupoa labradorica (Steud.) J.Cay. & Darbysh.

        This species is accepted, and its native range is Subarctic America to E. Canada.

    [GB]
    Habit
    Perennial; culms solitary. Rhizomes elongated. Culms erect; 15-40 cm long; 2.5-4 mm diam. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths 1.5-4 cm long; keeled. Ligule an eciliate membrane; 2.5 mm long; truncate. Leaf-blades conduplicate, or convolute; 5-15 cm long; 3-6 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear, or lanceolate; 6-12 cm long; 0.7-2 cm wide. Primary panicle branches ascending; bearing spikelets almost to the base. Panicle branches stiff; glabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5.5-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth; glabrous. Floret callus glabrous.
    Fertile
    Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 5.5-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth; glabrous. Floret callus glabrous.
    Glume
    Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma. Lower glume ovate; 4.5-5.5 mm long; 0.66-0.75 length of upper glume; cartilaginous; much thinner above; much thinner on margins; 1-keeled; 3 -veined. Lower glume apex acuminate. Upper glume ovate; 5-7.5 mm long; 1.25-1.5 length of adjacent fertile lemma; cartilaginous; much thinner above; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 4-5 mm long; membranous; much thinner above; keeled; 5-7 -veined. Lemma surface pubescent; hairy below. Lemma apex erose; acute. Palea 1 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 2 mm long.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Distribution
    North America: eastern Canada.
    Reference
    Poeae. Fernald 1997.

    Distribution

    Native to:

    Alaska, Labrador, Northwest Territorie, Québec

    × Dupoa labradorica (Steud.) J.Cay. & Darbysh. appears in other Kew resources:

    First published in Nordic J. Bot. 13: 616 (1993)

    Accepted by

    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. 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