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

    Chaetium Nees appears in other Kew resources:

    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 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