1. Family: Poaceae Barnhart
    1. Periballia Trin.

      1. This genus is accepted, and its native range is Iberian Peninsula.

    [GB]

    nonem

    Habit
    Annual. Culms erect (1/1), or decumbent (1/1); 3-20.5-40 cm long. Ligule an eciliate membrane.
    Inflorescences
    Inflorescence a panicle. Panicle open. Primary panicle branches without sterile bristles (2), or sterile at lowest node (1). Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; tip pyriform.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.5-2.176-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (2), or pubescent (1). Floret callus pubescent (1/2), or pilose (1/2).
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.5-2.176-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes glabrous (2), or pubescent (1). Floret callus pubescent (1/2), or pilose (1/2).
    Glume
    Glumes persistent; shorter than spikelet, or reaching apex of florets (1); thinner than fertile lemma (2), or similar to fertile lemma in texture (1). Lower glume lanceolate (2), or elliptic (1); 0.9-0.9667-1 length of upper glume; hyaline (2), or membranous (1); 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse (1), or acute. Upper glume lanceolate (1), or elliptic (1), or ovate (1); 0.8-0.9167-1.1 length of adjacent fertile lemma; hyaline (2), or membranous (1); 1-keeled; 1 -veined (2), or 3 -veined (1). Upper glume apex obtuse (1), or acute.
    Florets
    Fertile lemma oblong (2), or ovate (1); membranous; without keel; 3 -veined (1), or 5 -veined (2), or 6-7 -veined (1). Lemma midvein without distinctive roughness (2), or scaberulous (1). Lemma surface smooth (2), or asperulous (1); glabrous (2), or pubescent (1). Lemma apex obtuse (2), or acute (1); muticous (2), or awned (2); 1 -awned (2/2). Principal lemma awn dorsal (2/2). Palea 1 length of lemma.
    Flowers
    Anthers 3.
    Distribution
    Europe, or Africa (2), or Temperate Asia (1), or Australasia (1).

    Images

    Distribution

    Native to:

    Portugal, Spain

    Periballia Trin. appears in other Kew resources:

    First published in Fund. Agrost.: 133 (1820)

    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 2018. 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 2018. 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