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  1. Family: Poaceae Barnhart
    1. Pleuropogon R.Br.

      1. This genus is accepted, and its native range is Subarctic to W. U.S.A.

    [GB]

    nonem

    Habit
    Annual (1), or perennial (4). Rhizomes absent (1), or elongated (4). Culms erect (3/3), or geniculately ascending (1/3); 5-74.5-150 cm long; spongy (1), or firm (4). Ligule an eciliate membrane.
    Inflorescences
    Inflorescence composed of racemes. Racemes single; bilateral; bearing few fertile spikelets; bearing 5-10 fertile spikelets on each (2/2), or 11-12 fertile spikelets on each (1/2). Spikelet packing broadside to rhachis; distant. Spikelets appressed (2/4), or ascending (2/4), or deflexed (2/4); solitary. Fertile spikelets pedicelled. Pedicels linear.
    Spikelets
    Spikelets comprising 5 fertile florets (1), or 6 fertile florets (2), or 7 fertile florets (3), or 8 fertile florets, or 9-12 fertile florets (4), or 13 fertile florets (1); with diminished florets at the apex. Spikelets linear, or oblong (3); laterally compressed; 10-23.77-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 5 fertile florets (1), or 6 fertile florets (2), or 7 fertile florets (3), or 8 fertile florets, or 9-12 fertile florets (4), or 13 fertile florets (1); with diminished florets at the apex. Spikelets linear, or oblong (3); laterally compressed; 10-23.77-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume oblong (4), or ovate (1); 0.5-0.76-1 length of upper glume; hyaline; without keels; 0 -veined (1), or 1 -veined (4). Lower glume lateral veins absent. Lower glume apex erose; obtuse (1), or acute (4). Upper glume oblong (4), or ovate (1); 0.25-0.635-0.8 length of adjacent fertile lemma; hyaline; without keels; 0-1 -veined (1), or 3 -veined (3). Upper glume apex erose; obtuse (1), or acute (4).
    Florets
    Fertile lemma oblong (1), or ovate (4); chartaceous; without keel; 7 -veined. Lemma lateral veins without ribs (4), or ribbed (1). Lemma surface smooth (2), or asperulous (2), or scabrous (1). Lemma apex erose (4), or dentate (1); 2 -fid (1/1); emarginate (1/4), or obtuse (3/4), or acute (2/4); awned; 1 -awned. Principal lemma awn apical (4), or from a sinus (1). Palea 1 length of lemma; 2 -veined. Palea keels winged; with toothed wings (3), or each wing 1-awned (1), or each wing 2-awned (1); smooth (3), or scaberulous (2). Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; united; fleshy; truncate. Anthers 3 (4/4).
    Fruits
    Caryopsis with adherent pericarp; ellipsoid (1/1); dorsally compressed (1/1). Embryo 0.4 length of caryopsis. Hilum linear; 1 length of caryopsis.
    Distribution
    Europe (1), or Temperate Asia (1), or North America.

    Images

    Distribution

    Native to:

    Alaska, Altay, British Columbia, California, Greenland, Krasnoyarsk, Labrador, Magadan, North European Russi, Nunavut, Ontario, Oregon, Québec, Svalbard, Washington, West Siberia, Yakutskiya

    Accepted Species

    Synonyms

    Other Data

    Pleuropogon R.Br. appears in other Kew resources:

    Bibliography

    First published in Chlor. Melvill.: 31 (1823)

    Accepted by

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

    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