1. Family: Poaceae Barnhart
    1. Ortachne Nees ex Steud.

      1. This genus is accepted, and its native range is Costa Rica to Peru, S. Chile to S. Argentina.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (1), or elongated (2). Culms erect; 12-25.66-44 cm long. Ligule an eciliate membrane. Leaf-blades aciculate (1), or filiform; stiff. Leaf-blade apex muticous (1), or pungent (2).
    Inflorescences
    Inflorescence a panicle. Panicle open (2), or contracted (1). Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.075-3.779-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent (2), or pilose (1); acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 2.075-3.779-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent (2), or pilose (1); acute.
    Glume
    Glumes persistent; shorter than spikelet; thinner than fertile lemma (2), or similar to fertile lemma in texture (1). Lower glume oblong; 1-1.033-1.1 length of upper glume; hyaline (2), or membranous (1); without keels; 0 -veined (1), or 1 -veined, or 2-3 -veined (1). Lower glume lateral veins absent, or obscure (1). Lower glume apex emarginate, or truncate. Upper glume oblong; 0.5-0.7333-0.9 length of adjacent fertile lemma; hyaline (2), or membranous (1); without keels; 0 -veined (2), or 1 -veined, or 2-3 -veined (1). Upper glume apex entire, or erose (2); emarginate (1), or truncate (1), or obtuse (2).
    Florets
    Fertile lemma elliptic; membranous; without keel (1), or keeled (2); 3 -veined (1), or 5 -veined (2). Lemma midvein without distinctive roughness (2), or scabrous (1); eciliate (1), or pubescent (2). Lemma lateral veins obscure (2/2). Lemma surface smooth (2), or scaberulous (1). Lemma margins eciliate (2), or ciliate (2). Lemma apex entire (1), or dentate (2); 2 -fid (2/2); acuminate; awned; 1 -awned. Principal lemma awn straight (1), or curved (2), or flexuous (1). Palea 0.9-0.9667-1 length of lemma; 2 -veined; without keels. Palea surface glabrous (2), or pubescent (1), or pilose (1).
    Flowers
    Lodicules 2 (1), or 3 (2); membranous; truncate (1/2), or obtuse (1/2). Anthers 3.
    Fruits
    Caryopsis with adherent pericarp; fusiform (2/2); rugose (1/1). Hilum linear (1/1); 1 length of caryopsis.
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Argentina South, Chile South, Colombia, Costa Rica, Ecuador, Peru, Venezuela

    Ortachne Nees ex Steud. appears in other Kew resources:

    First published in Syn. Pl. Glumac. 1: 121 (1854)

    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