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  1. Family: Poaceae Barnhart
    1. Chaetium Nees

      1. This genus is accepted, and its native range is Mexico to Venezuela, Cuba, NE. Brazil.

    [GB]

    nonem

    Habit
    Perennial. Culms erect (1/1); 30-66.66-120 cm long. Ligule a ciliolate membrane (1), or a ciliate membrane (1), or a fringe of hairs (1).
    Inflorescences
    Inflorescence composed of racemes. Racemes borne along a central axis; erect; unilateral. Rhachis angular. Spikelet packing lax. Spikelets in pairs. Fertile spikelets sessile and pedicelled (1), or pedicelled (2); 2 in the cluster.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; plano-convex; 4-6.53-10 mm long; falling entire. Spikelet callus linear; pubescent (1), or pilose (2); base obtuse; attached obliquely.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; plano-convex; 4-6.53-10 mm long; falling entire. Spikelet callus linear; pubescent (1), or pilose (2); base obtuse; attached obliquely.
    Glume
    Glumes shorter than spikelet (1), or reaching apex of florets (2); thinner than fertile lemma. Lower glume subulate (1), or linear (1), or lanceolate (1); membranous (1/2), or herbaceous (1/2); without keels (2/2); 3 -veined (1/2), or 5-7 -veined (1/2). Lower glume surface smooth (2), or scabrous (1). Lower glume apex acuminate (1/1); awned (2/2). Upper glume lanceolate; hyaline (1), or membranous (1), or herbaceous (1); without keels; 3 -veined (1), or 5-6 -veined (1), or 7 -veined (2). Upper glume lateral veins without ribs (2), or ribbed (1). Upper glume surface asperulous (2), or scabrous (1). Upper glume apex acuminate (2/2); awned; 1 -awned.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate (1), or oblong (1), or ovate (1); 1 length of fertile lemma; hyaline (1), or membranous (2); 3 -veined (1), or 5 -veined (2); without ribs (1), or ribbed (2); acute (2), or setaceously attenuate (1); muticous (2), or awned (1). Fertile lemma lanceolate (1), or elliptic (1), or ovate (1); coriaceous; without keel; 5 -veined (2/2). Lemma surface smooth (2), or scaberulous (1). Lemma margins involute. Lemma apex acute; muticous (1), or awned (2); 1 -awned (2/2). Palea not rolled (1), or involute (2); 1 length of lemma; coriaceous.
    Distribution
    North America (1), or South America.

    Images

    Distribution

    Native to:

    Brazil Northeast, Colombia, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Nicaragua, Panamá, Venezuela

    Accepted Species

    Synonyms

    Other Data

    Chaetium Nees appears in other Kew resources:

    Bibliography

    First published in C.F.P.von Martius, Fl. Bras. Enum. Pl. 2: 269 (1829)

    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