1. Family: Poaceae Barnhart
    1. Munroa Torr.

      1. This genus is accepted, and its native range is W. Canada to W. & Central U.S.A., Mexico, Peru to N. Argentina.

    [GB]

    nonem

    Habit
    Annual. Stolons present. Culms decumbent; 5-8.8-15 cm long. Culm-internodes alternately elongated and bunched. Lateral branches ample (4/4). Ligule a fringe of hairs. Leaf-blades stiff. Leaf-blade margins cartilaginous.
    Inflorescences
    Inflorescence comprising only a few spikelets; terminal and axillary; not deciduous as a whole (3), or deciduous as a whole (2); subtended by an unspecialized leaf-sheath (2), or an inflated leaf-sheath (3); embraced at base by subtending leaf. Peduncle persistent (3), or disarticulating (2). Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 2-3 fertile florets (2), or 4-5 fertile florets (1), or 6-8 fertile florets (2), or 9-10 fertile florets (1); with a barren rhachilla extension (1), or with diminished florets at the apex (4). Spikelets lanceolate (1), or oblong (4); laterally compressed; 4-5.35-10 mm long; falling entire (2), or breaking up at maturity (3); deciduous with accessory branch structures (2/2); disarticulating below each fertile floret (3/3). Floret callus pubescent (4/4).
    Fertile
    Spikelets comprising 2-3 fertile florets (2), or 4-5 fertile florets (1), or 6-8 fertile florets (2), or 9-10 fertile florets (1); with a barren rhachilla extension (1), or with diminished florets at the apex (4). Spikelets lanceolate (1), or oblong (4); laterally compressed; 4-5.35-10 mm long; falling entire (2), or breaking up at maturity (3); deciduous with accessory branch structures (2/2); disarticulating below each fertile floret (3/3). Floret callus pubescent (4/4).
    Glume
    Glumes both absent or obscure (1), or two (4); persistent (3/3); shorter than spikelet (3/4), or reaching apex of florets (1/4); thinner than fertile lemma (4/4). Lower glume linear (2/4), or lanceolate (2/4); 0.5-0.75-1 length of upper glume; membranous (4/4); without keels (4/4); 1 -veined (4/4). Lower glume lateral veins absent (4/4). Lower glume apex acute (1/4), or acuminate (3/4). Upper glume linear (1/4), or lanceolate (3/4); 0.9-1.05-1.2 length of adjacent fertile lemma; membranous (4/4); without keels (3/4), or 1-keeled (1/4); 1 -veined (4/4). Upper glume apex obtuse (1/4), or acute (2/4), or acuminate (1/4); muticous (3/4), or mucronate (1/4).
    Florets
    Fertile lemma elliptic (2), or oblong (1), or cuneate (2); chartaceous; without keel; 3 -veined. Lemma lateral veins excurrent (2/3), or extending close to apex (2/3). Lemma surface smooth (1), or granulose (3), or scaberulous (1); without hair tufts (2), or with marginal hair tufts (2), or with tufts of hair on midvein (2). Lemma margins eciliate (3), or ciliate (2). Lemma apex entire (1), or dentate (2), or lobed (2); 2 -fid (1/4), or 3 -fid (2/4), or 4 -fid (1/4); incised 0.2-0.35-0.5 of lemma length; truncate (1/2), or obtuse (1/2); awned; 1 -awned (4), or 3 -awned (1). Principal lemma awn apical (2), or from a sinus (3). Lateral lemma awns shorter than principal (1/1). Palea surface glabrous (4), or pubescent (1). Apical sterile florets resembling fertile though underdeveloped (4/4).
    Flowers
    Anthers 2 (4), or 3 (1). Stigmas 2; plumose (3), or papillose (2).
    Fruits
    Caryopsis with adherent pericarp; fusiform (1), or ovoid (4); laterally compressed (4/4); smooth. Embryo 0.33-0.4433-0.5 length of caryopsis.
    Distribution
    North America (1), or South America (4).

    Distribution

    Native to:

    Alberta, Argentina Northeast, Argentina Northwest, Arizona, Bolivia, California, Chile North, Colorado, Kansas, Manitoba, Mexico Central, Mexico Northeast, Mexico Northwest, Minnesota, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Peru, Saskatchewan, South Dakota, Texas, Utah, Wyoming

    Introduced into:

    Maryland

    Munroa Torr. appears in other Kew resources:

    First published in Pacif. Railr. Rep. Whipple, Bot. 4(5; 4): 158 (1857)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the 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