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  1. Family: Poaceae Barnhart
    1. Chascolytrum Desv.

      1. This genus is accepted, and its native range is Mexico to Bolivia, SE. & S. Brazil to S. South America.

    [GB]

    nonem

    Habit
    Perennial. Culms 50-70 cm long. Ligule an eciliate membrane. Leaf-blades filiform, or linear.
    Inflorescences
    Inflorescence a panicle. Panicle open. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets orbicular; laterally compressed; 1.5-2 mm long; breaking up at maturity; disarticulating below each fertile floret, or above glumes but not between florets.
    Fertile
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets orbicular; laterally compressed; 1.5-2 mm long; breaking up at maturity; disarticulating below each fertile floret, or above glumes but not between florets.
    Glume
    Glumes persistent; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute. Upper glume ovate; 1.3 length of adjacent fertile lemma; chartaceous; without keels; 1 -veined. Upper glume apex acute.
    Florets
    Fertile lemma orbicular; indurate; keeled; 5 -veined. Lemma surface scabrous, or tuberculate. Lemma margins involute. Lemma apex obtuse. Palea 1 length of lemma; indurate; 2 -veined. Palea surface pilose.
    Flowers
    Anthers 1.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Distribution
    South America.
    [GB]

    nonem

    Habit
    Perennial. Culms erect (1), or decumbent (2); 40-57.5-70 cm long. Ligule an eciliate membrane.
    Inflorescences
    Inflorescence a panicle. Panicle contracted. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear (2/2).
    Spikelets
    Spikelets comprising 3 fertile florets (1), or 4 fertile florets (2), or 8-10 fertile florets (1); with diminished florets at the apex. Spikelets lanceolate (1), or oblong (1), or rhomboid (1); laterally compressed; 4.5-6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent (2/2).
    Fertile
    Spikelets comprising 3 fertile florets (1), or 4 fertile florets (2), or 8-10 fertile florets (1); with diminished florets at the apex. Spikelets lanceolate (1), or oblong (1), or rhomboid (1); laterally compressed; 4.5-6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent (2/2).
    Glume
    Glumes persistent; shorter than spikelet; firmer than fertile lemma. Lower glume lanceolate (1), or elliptic (1), or oblong (1); 1 length of upper glume; chartaceous; 1-keeled; 3 -veined. Lower glume surface smooth (2), or asperulous (1). Lower glume apex obtuse (2), or acute (1). Upper glume lanceolate (1), or elliptic (1), or oblong (1); 1 length of adjacent fertile lemma; chartaceous; 1-keeled; 3 -veined. Upper glume surface smooth (2), or asperulous (1). Upper glume apex obtuse (2), or acute (1).
    Florets
    Fertile lemma elliptic (2), or ovate (1); thickened on margins at base; dorsally compressed; membranous; firmer on margins; keeled; 5 -veined. Lemma midvein without distinctive roughness (2), or scaberulous (1). Lemma surface smooth (2), or asperulous (1); glabrous (2), or pubescent (1). Lemma margins eciliate (1), or ciliate (2), or pubescent (1). Lemma apex entire (1), or dentate (2); 2 -fid (2/2); acute (1/1); muticous, or mucronate (2). Palea 0.75-0.8-0.85 length of lemma; 2 -veined. Palea keels pubescent (1), or ciliolate (2). Palea surface glabrous (2), or pilose (1). Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 1. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; oblong (1/1); dorsally compressed (1/1); concavo-convex (1/1). Hilum punctiform (2/2).
    Distribution
    South America.
    [GB]

    nonem

    Habit
    Perennial. Culms 30-45 cm long. Ligule an eciliate membrane.
    Inflorescences
    Inflorescence a panicle. Panicle contracted. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-4 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; 4-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2-4 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; 4-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.8-1 length of upper glume; membranous; 1-keeled; 5 -veined. Lower glume apex acute. Upper glume ovate; 1 length of adjacent fertile lemma; membranous; 1-keeled; 7 -veined. Upper glume apex acute.
    Florets
    Fertile lemma ovate; coriaceous; without keel; 7 -veined. Lemma surface pubescent. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus. Palea 2 -veined. Palea keels ciliate. Palea surface pubescent.
    Flowers
    Anthers 3. Stigmas 2; pubescent. Ovary glabrous.
    Fruits
    Hilum elliptic.
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Argentina South, Bolivia, Brazil South, Brazil Southeast, Chile Central, Chile South, Colombia, Ecuador, Guatemala, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Paraguay, Peru, Uruguay

    Extinct in:

    Juan Fernández Is.

    Introduced into:

    Cape Provinces, New South Wales, New Zealand North, Puerto Rico

    Accepted Species

    Synonyms

    Other Data

    Chascolytrum Desv. appears in other Kew resources:

    Bibliography

    First published in Nouv. Bull. Sci. Soc. Philom. Paris 2: 190 (1810)

    Not 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. [Cited as Briza.]

    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