1. Family: Poaceae Barnhart
    1. Arberella Soderstr. & C.E.Calderón

      1. This genus is accepted, and its native range is Costa Rica to S. Tropical America.

    [GB]

    nonem

    Habit
    Perennial. Culms erect (5), or geniculately ascending (6); 15-35.14-60 cm long; firm (6), or wiry (1). Culm-internodes terete (1/1). Culm-nodes constricted (2/2). Lateral branches lacking (6/6). Ligule a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate (6), or elliptic (1), or oblong (1), or ovate (3).
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Inflorescence a panicle; terminal and axillary; exserted (6), or embraced at base by subtending leaf (1). Panicle open (6), or contracted (1). Sexes segregated; on unisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled; 1 in a cluster (1/5), or 2 in a cluster (5/5), or 3 in a cluster (1/5). Pedicels filiform (1/6), or linear (4/6), or clavate (6/6).
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (6), or elliptic (1), or obovate (1); dorsally compressed; 7.055-13.19-22 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (1), or evident (6); glabrous (1/4), or pubescent (2/4), or woolly (1/4); truncate. Male spikelets distinct from female; linear (4), or lanceolate (6), or elliptic (1). Male spikelet glumes absent. Male spikelet lemma awned (2/2).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (6), or elliptic (1), or obovate (1); dorsally compressed; 7.055-13.19-22 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (1), or evident (6); glabrous (1/4), or pubescent (2/4), or woolly (1/4); truncate.
    Glume
    Glumes deciduous; exceeding apex of florets; thinner than fertile lemma; incurved at apex (1), or parallel to lemmas (6). Lower glume lanceolate (2), or elliptic (5); 1-1.05-1.1 length of upper glume; membranous (6), or chartaceous (1); without keels; 5-6 -veined (1), or 7 -veined (2), or 8 -veined (1), or 9 -veined (4), or 10 -veined (1), or 11 -veined (2). Lower glume surface smooth (5), or scabrous (2). Lower glume apex acuminate (2), or attenuate (4), or caudate (1); muticous (6), or awned (1). Upper glume lanceolate (2), or elliptic (5); 1.3-1.521-1.6 length of adjacent fertile lemma; membranous (6), or chartaceous (1); without keels; 5-6 -veined (2), or 7 -veined (3), or 8 -veined (2), or 9 -veined (4), or 10 -veined (1). Upper glume lateral veins with cross-veins (5/5). Upper glume surface smooth (6), or scabrous (1). Upper glume apex acute (1), or acuminate (4), or attenuate (2), or caudate (1).
    Florets
    Fertile florets female. Fertile lemma lanceolate (2), or elliptic (5), or oblong (1), or ovate (2); dorsally compressed; indurate; without keel; 5 -veined (4/5), or 7 -veined (1/5). Lemma surface pubescent (6), or pilose (1). Lemma margins eciliate (1), or ciliate (1), or pubescent (5). Lemma apex acute (5), or acuminate (1), or apiculate (1). Palea 1 length of lemma; indurate; 4 -veined (1/4), or 6 -veined (1/4), or 8 -veined (1/4), or 9 -veined (2/4), or 10 -veined (1/4). Palea surface glabrous (5), or puberulous (1), or pubescent (2).
    Flowers
    Lodicules 3; membranous; truncate (1/1). Anthers 3. Stigmas 2; plumose (6), or sparsely hairy (1).
    Fruits
    Hilum linear (1/1); 1 length of caryopsis.
    Male
    Male spikelets distinct from female; linear (4), or lanceolate (6), or elliptic (1). Male spikelet glumes absent. Male spikelet lemma awned (2/2).
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Argentina Northeast, Belize, Brazil North, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Colombia, Costa Rica, French Guiana, Guatemala, Honduras, Mexico Southeast, Mexico Southwest, Panamá, Paraguay, Peru, Suriname, Venezuela

    Arberella Soderstr. & C.E.Calderón appears in other Kew resources:

    First published in Brittonia 31: 433 (1979)

    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