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  1. Family: Poaceae Barnhart
    1. Metcalfia Conert

      1. This genus is accepted, and its native range is Mexico.

    [GB]

    nonem

    Habit
    Perennial. Culms erect, or geniculately ascending (1); 10-37.5-90 cm long. Ligule an eciliate membrane. Leaf-blades filiform (3), or linear (1). Leaf-blade apex muticous (3), or pungent (1).
    Inflorescences
    Inflorescence a panicle (3), or composed of racemes (2), or comprising only a few spikelets (1). Panicle contracted (3/3). Racemes single (2/2); paucilateral (2/2); bearing 3-4 fertile spikelets on each (1/1). Spikelets solitary (3), or in pairs (1). Fertile spikelets pedicelled; 2 in the cluster (1/1). Pedicels oblong (1/1).
    Spikelets
    Spikelets comprising 3 fertile florets (1), or 4 fertile florets (2), or 5-7 fertile florets (3), or 8-9 fertile florets (2); with diminished florets at the apex. Spikelets lanceolate (1), or oblong (3); laterally compressed; 12-16-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (2), or pilose (2). Floret callus brief (1), or evident (3); pilose (3/3).
    Fertile
    Spikelets comprising 3 fertile florets (1), or 4 fertile florets (2), or 5-7 fertile florets (3), or 8-9 fertile florets (2); with diminished florets at the apex. Spikelets lanceolate (1), or oblong (3); laterally compressed; 12-16-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (2), or pilose (2). Floret callus brief (1), or evident (3); pilose (3/3).
    Glume
    Glumes persistent; shorter than spikelet (1), or reaching apex of florets (3). Lower glume lanceolate; 0.8-0.925-1 length of upper glume; membranous; without keels (1/3), or 1-keeled (2/3); 1-3 -veined (1), or 5-6 -veined (2), or 7 -veined (3), or 8-9 -veined (1). Lower glume lateral veins absent (1), or distinct. Lower glume surface smooth (3), or asperulous (1). Lower glume apex acute (1), or attenuate (3); muticous (3), or awned (1). Upper glume lanceolate; 1.1-1.3-1.5 length of adjacent fertile lemma; membranous; without keels (1/3), or 1-keeled (2/3); 5-6 -veined (3), or 7 -veined, or 8-9 -veined (1). Upper glume surface smooth (3), or asperulous (1). Upper glume apex attenuate (2/2); muticous (3), or awned (1); 1 -awned (1/1).
    Florets
    Fertile lemma lanceolate (3), or ovate (1); membranous (1), or cartilaginous (3); without keel; 7 -veined. Lemma surface smooth (3), or scaberulous (1); glabrous (1), or pubescent (2), or pilose (2). Lemma apex dentate (1), or lobed (3); 2 -fid; incised 0.05-0.1833-0.25 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Palea 0.75 length of lemma. Palea keels wingless (3), or winged (1); smooth (1), or scaberulous (3). Palea apex dentate (1/1). Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3 (3/3); glabrous (3/3), or ciliate (1/3). Anthers 2 (1), or 3 (3). Stigmas 2 (2/2), or 3 (1/2). Ovary pubescent on apex (1/3), or pubescent all over (2/3).
    Fruits
    Hilum linear (2/2); 0.33 length of caryopsis.
    Distribution
    Europe (2), or Temperate Asia (2), or North America (1).

    Images

    Distribution

    Native to:

    Mexico Central, Mexico Northeast, Mexico Southwest

    Accepted Species

    Other Data

    Metcalfia Conert appears in other Kew resources:

    Bibliography

    First published in Willdenowia 2: 417 (1960)

    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