1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca richardsonii Hook.

        This species is accepted, and its native range is Subarctic to Pakistan and NW. U.S.A.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Rhizomes elongated. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations extravaginal. Culms 22-40 cm long. Leaf-sheaths tubular for much of their length; with 1 of their length closed; with flat margins; glabrous on surface. Ligule an eciliate membrane. Leaf-blades filiform; flat, or conduplicate; 0.5-1 mm wide. Leaf-blade venation comprising 7 vascular bundles; with 3-5 inner ridges; with sclerenchyma strands below veins, or below veins and above some veins; with subepidermal sclerenchyma free from veins. Leaf-blade surface ribbed; smooth, or scabrous; rough adaxially. Leaf-blade apex obtuse.
    Inflorescences
    Inflorescence a panicle. Panicle open; dense; 4-7 cm long. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets with diminished florets at the apex. Spikelets oblong; laterally compressed; 7-8.6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas.
    Fertile
    Spikelets with diminished florets at the apex. Spikelets oblong; laterally compressed; 7-8.6 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 3-3.6 mm long; 0.75 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex obtuse, or acute.
    Florets
    Fertile lemma oblong; 4-5.3 mm long; chartaceous; pallid; without keel; 5 -veined. Lemma surface pubescent. Lemma apex acute; muticous, or awned; 1 -awned. Principal lemma awn 1-1.6 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid. Hilum linear. Disseminule comprising a caryopsis and palea.
    Distribution
    Europe: northern and eastern.
    Reference
    Poeae. Fl Eur 1995.

    Distribution

    Native to:

    Alaska, Alberta, Aleutian Is., Altay, British Columbia, Buryatiya, Central European Rus, China North-Central, China South-Central, East European Russia, Finland, Føroyar, Greenland, Iceland, Inner Mongolia, Irkutsk, Kamchatka, Kazakhstan, Kirgizstan, Krasnoyarsk, Kuril Is., Labrador, Magadan, Manitoba, Mongolia, Montana, Newfoundland, North European Russi, Northwest Territorie, Norway, Nova Scotia, Nunavut, Ontario, Pakistan, Qinghai, Québec, Saskatchewan, Svalbard, Sweden, Tadzhikistan, Tibet, West Himalaya, West Siberia, Wyoming, Xinjiang, Yakutskiya, Yukon

    Festuca richardsonii Hook. appears in other Kew resources:

    First published in Fl. Bor.-Amer. 2: 250 (1840)

    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.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

    Literature

    Kew Backbone Distributions
    • Wu, Z. & Raven, P.H. (eds.) (2006). Poaceae Flora of China 22: 1-733. Missouri Botanical Garden Press, St. Louis.
    • Malyschev, L.I. & Peschkova, G.A. (eds.) (2001). Flora of Siberia 2: 1-362. Scientific Publishers, Inc., Enfield, Plymouth.
    • Cope, T.A. (1982). Flora of Pakistan 143: 1-678. Department of Botany, University of Karachi, Karachi.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.
    • Hultén, E.O.G. (1960). Flora of the Aleutian Islands and westernmost Alaska Peninsula: with notes on the flora of Commander Islands, ed. 2: 1-376. Weinheim : J. Cramer ; New York : Hafner Pub. Co.

    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 2019. 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 2019. 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