1. Family: Poaceae Barnhart
    1. Lithachne P.Beauv.

      1. This genus is accepted, and its native range is Tropical & Subtropical America.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (3), or short (1). Stolons absent (3), or present (1). Culms erect (1/1), or geniculately ascending (1/1); slender (1/1); 10-25.87-75 cm long; rooting from lower nodes (1/1). Culm-internodes terete (1/1). Culm-nodes constricted (1/1); with distinct supra-nodal ridge (1/1). Ligule an eciliate membrane (2), or a ciliolate membrane (2). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate, or oblong (1), or ovate (1).
    Inflorescences
    Monoecious; with male and female spikelets in different inflorescences (3), or with male terminal and mixed axillary inflorescences (1). Inflorescence comprising only a few spikelets; axillary; exserted (2), or embraced at base by subtending leaf (1), or enclosed (2). Sexes segregated (1/1); with male below (1/1). Spikelets solitary. Fertile spikelets sessile (3), or pedicelled (1). Male spikelets pedicelled. Pedicels cuneate (1/1). Male inflorescence terminal; unlike female; a panicle (2), or of few spikelets (2). Male spikelets distinct from female; linear (3/3), or lanceolate (3/3). Male spikelet glumes absent. Male spikelet lemma muticous (3), or awned (1).
    Sterile
    Basal sterile spikelets absent (3), or represented by a single scale (1).
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 4-6.875-11 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; truncate. Basal sterile spikelets absent (3), or represented by a single scale (1).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 4-6.875-11 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; truncate.
    Glume
    Glumes deciduous; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; membranous (1), or herbaceous (3); without keels; 5 -veined (1), or 7-8 -veined (1), or 9 -veined (3). Lower glume apex acuminate (2), or caudate (2). Upper glume ovate; 1.3-1.862-2.5 length of adjacent fertile lemma; membranous (1), or herbaceous (3); without keels; 3 -veined (1), or 5-6 -veined (1), or 7 -veined (2), or 9 -veined (1). Upper glume apex acuminate (2), or caudate (2).
    Florets
    Fertile florets female. Fertile lemma obovate; laterally compressed; gibbous; triangular in profile (3), or hemispherical (1); indurate; without keel; 5 -veined (1/1). Lemma margins involute. Lemma apex truncate. Palea indurate.
    Flowers
    Lodicules 3. Anthers 3. Stigmas 2 (1/1).
    Fruits
    Caryopsis with adherent pericarp; orbicular (1/1). Hilum linear (1/1); 1 length of caryopsis.
    Male
    Male inflorescence terminal; unlike female; a panicle (2), or of few spikelets (2). Male spikelets distinct from female; linear (3/3), or lanceolate (3/3). Male spikelet glumes absent. Male spikelet lemma muticous (3), or awned (1).
    Distribution
    North America (1), or South America.

    Images

    Distribution

    Native to:

    Argentina Northeast, Argentina Northwest, Belize, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, French Guiana, Guatemala, Haiti, Honduras, Jamaica, Leeward Is., Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Nicaragua, Panamá, Paraguay, Peru, Puerto Rico, Trinidad-Tobago, Venezuela, Windward Is.

    Introduced into:

    Florida

    Lithachne P.Beauv. appears in other Kew resources:

    First published in Ess. Agrostogr.: 135 (1812)

    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